Calculate (i)x (ii) y (iii) ∠BAC (c) In the figure (1) given below, calculate the size of each lettered angle. In the given figure, BD = AD = AC. Prove that BC < CD. Solution: Question 2. (c) In the figure (3) given below, AC = CD. Calculate ∠ ACD and state (giving reasons) which is greater : BD or DC ? 2) DAE=15. BC = Hyp. Find the measure of ∠A. Question 15. In the given figure, PQ || BA and RS CA. Given: In right triangle ΔABC, ∠BAC = 90 °, AB = AC and ∠ACD = ∠BCD. Cde is an Equilateral Triangle Formed on a Side Cd of a Square Abcd. Prove that (i) ∆EBC ≅ ∆DCB (ii) ∆OEB ≅ ∆ODC (iii) OB = OC. Solution: (i) Length of sides of a triangle are 4 cm, 3 cm and 7 cm We know that sum of any two sides of a triangle is greatar than its third side But 4 + 3 = 7 cm Which is not possible Hence to construction of a triangle with sides 4 cm, 3 cm and 7 cm is not possible. Solution: Question 9. Solution: Question P.Q. Choose the correct answer from the given four options (1 to 18): Question 1. Is the statement true? endobj SAS SAS #1 #5 Given: AEB & CED intersect at E E is the midpoint AEB AC AE & BD BE Prove: … Question 16. Solution: Question 2. To prove: AC + AD = BC Proof: Let AB = AC = x and AD = y. In ∆ABC, D is a point on BC such that AD is the bisector of ∠BAC. In the given figure, two lines AB and CD intersect each other at the point O such that BC || DA and BC = DA. (b) In the figure (2) given below, ∠ ABD = 65°, ∠DAC = 22° and AD = BD. Therefore, AC = AB. “If two sides and an angle of one triangle are equal to two sides and an angle of another triangle, then the two triangles must be congruent.” Is the statement true? SAS SAS #4 Given: PQR RQS PQ QS Prove: PQR RQS Statement 1. C. RWS ≅ UWT by AAS. Question 16. In the given figure, AB = AC, P and Q are points on BA and CA respectively such that AP = AQ. Given ∠ADC = 130° and chord BC = chord BE. In the adjoining figure, ABCD is a quadrilateral in which BN and DM are drawn perpendiculars to AC such that BN = DM. 4 0 obj Page No 13: Question 1: Given below are some triangles and lengths of line segments. (a) In the figure (1) given below, QX, RX are bisectors of angles PQR and PRQ respectively of A PQR. Solution: Question 15. Solution: Question 5. Give reason for your answer. If a, b, c are the lengths of the sides of a trianlge, then (a) a – b > c (b) c > a + b (c) c = a + b (d) c < A + B Solution: a, b, c are the lengths of the sides of a trianlge than a + b> c or c < a + b (Sum of any two sides is greater than its third side) (d), Question 14. Solution: Given : In figure, BA ⊥ AC, DE ⊥ EF . The length of the third side of the triangle can not be (a) 3.6 cm (b) 4.1 cm (c) 3.8 cm (d) 3.4 cm Solution: Question 13. In right triangle ABC, right angled at C, M is the mid-point of hypotenuse AB. Solution: Question 13. CPCTC 2. ACD = BDC. ABC is an isosceles triangle with AB=AC. (b) In the figure (2) given below, prove that (i) x + y = 90° (ii) z = 90° (iii) AB = BC Solution: Question 14. In the given figure, ABC and DBC are two isosceles triangles on the same base BC and vertices A and D are on the same side of BC. In the given figure, AD is median of ∆ABC, BM and CN are perpendiculars drawn from B and C respectively on AD and AD produced. Construct a triangle ABC given that base BC = 5.5 cm, ∠ B = 75° and height = 4.2 cm. Angle BAD is congruent to angle BCD Prove: Triangle ADC is isosceles So far I have this: 1. Solution: Question 2. Therefore, AFDE, BDEF and DCEF are all parallelograms. ABC ADC Reasons Given 2. Solution: Question 6. In a triangle ABC, AB = AC, D and E are points on the sides AB and AC respectively such that BD = CE. (a) In the figure (1) given below, AB = AD, BC = DC. 3 0 obj Solution: Question 7. (iii) ∵ ∆ABD ≅ ∠BAC | Proved in (i) ∴ ∠ABD = ∠BAC. Given: Prove: Statements Reasons. Given: ABCD is a rectangle in which diagonal AC bisects ∠A as well as ∠C. Question 2. (c) In the figure (3) given below, AB || CD. Given 3. … Show that: (i) … <>>> | C.P.C.T. Solution: Question 8. ( For a Student and Employee), Thank You Letter for Job Interview, Friend, Boss, Support | Appreciation and Format of Thank You Letter, How To Write a Cover Letter | Format, Sample and Important Guidelines of Cover letter, How to Address a Letter | Format and Sample of Addressing a Letter, Essay Topics for High School Students | Topics and Ideas of Essay for High School Students, Model Essay for UPSC | Tips and List of Essay Topics for UPSC Exam, Essay Books for UPSC | Some Popular Books for UPSC Exam. Solution: Question 8. Draw AP ⊥ BC to show that ∠B = ∠C. CD Side BC DA Side 2. #3 Given: AB CD and BC AD DAB, ABC, BCD and CDA are rt Prove: ABC ADC Statement Reasons #4 Given: PQR RQS PQ … Solution: The given statement can be true only if the corresponding (included) sides are equal otherwise not. Solution: Given : In the given figure, AB || DC CE and DE bisects ∠BCD and ∠ADC respectively To prove : AB = AD + BC Proof: ∵ AD || DC and ED is the transversal ∴ ∠AED = ∠EDC (Alternate angles) = ∠ADC (∵ ED is bisector of ∠ADC) ∴ AD = AE …(i) (Sides opposite to equal angles) Similarly, ∠BEC = ∠ECD = ∠ECB ∴ BC = EB …(ii) … Given AD BC. Answer: Since BD is the transversal for lines ED and BC and alternate angles are equal, ED || BC. Draw AP ⊥ BC to show that ∠B = ∠C. AB bisects CBD 2. Show that (i) ∆ACD ≅ ∆BDC (ii) BC = AD (iii) ∠A = ∠B. Prove that AF = BE. Solution: Question 6. As F and E are the mid points of sides AB and AC of ∆ ABC. Which of the following is not a criterion for congruency of triangles? R is the mdpt of 4. Show that (i) AC > DC (ii) AB > AD. Prove that (a) BP = CP (b) AP bisects ∠BAC. Someone may be able to see a way forward without wasting time duplicating your effort. x��]o�6�}�=v��ɞa v��pb�}����4��nb#��3��K��RZ؉���3��d��dӜ]7��g����i/.���W������o�hn�N6�i�����B5V8��_��l��#~{y�y��l�{s��d�@� 0?{�mFg�^��s֪! Why? In parallelogram ABCD, E is the mid-point of side AB and CE bisects angle BCD. Use SSS rule of congruency to show that (i) ∆ABD ≅ ∆ACD (ii) AD is bisector of ∠A (iii) AD is perpendicular to BC. Question 4. Show that (i) ∆ACD ≅ ∆BDC (ii) BC = AD (iii) ∠A = ∠B. Solution: Question 5. In each of the following diagrams, find the values of x and y. Prove that BM = CN. Show that δAde ≅ δBce. Show that ∆ADE ≅ ∆BCE and hence, AEB is an isosceles triangle. Given: Prove: Statements Reasons Which is the least angle. Solution: Question 6. In ∆ABC, ∠A = 50°, ∠B= 60°, Arrange the sides of the triangle in ascending order. Prove that AB = AD + BC. Solution: Question P.Q. AB = AC (Given) ∠B = ∠C (Angles opposite to equal sides are equal) In: ∠A + ∠B + ∠C = 180° 50° + ∠B + ∠C = 180° 2∠C … B. Expert Answer: 1= 2 and 3 = 4. Question 9. Prove that (i) AD = BC (ii) AC = BD. R is the midpoint of 2. Which side of APQR should be equal to side AB of AABC so that the two triangles are congruent? In the adjoining figure, AB ⊥ BE and FE ⊥ BE. Which congruency theorem can be used to prove that GHL ≅ KHJ? Solution: Question 1. ABC ADC Angle 4. Point D is joined to point B (see figure). Give reason for your answer. CE is drawn parallel to DA to meet BD produced at E. Prove that ∆CAE is isosceles Solution: Question 9. Prove that (i) ∆EBC ≅ ∆DCB (ii) ∆OEB ≅ ∆ODC (iii) OB = OC. 11. Solution: Question 10. @Sȗ�S���}������[2��6LӸ�_^_5�x/���7�{��N�p%�]p-n�\7�T�n>{�z�� ������d����x��:B�Ի���vz����X��#�gV&�����r�1�$�J��~x���|NP,�dƧ$&�kg�c�ɂ���1�i���8��SeK0����q� -�Y�0]Ip��Yc B��J�����2�H'�5����3ۇݩ�~�Wz��@�q %i�"%�����$�y%���k}L(�%B�> �� �A֣YU딷J5�q7�'ǨF�,��O�U��%�"ﯺyz����������'��H�I��X�(�J|3>�v�����=~���Β�v�� �A�qȍR5J*���0-}۟l�~ ABC is an isosceles triangle with AB=AC. In the given figure, AB = AC, D is a point in the interior of ∆ABC such that ∠DBC = ∠DCB. Given A 3. Prove that AB = AD + BC. In the adjoining figure, AB = FC, EF=BD and ∠AFE = ∠CBD. Question 1. BA = DE and BF = DC To Prove : AC = EF Proof : BF = DC (given) Adding FC both sides, BF + FC = FC + CD => BC = FD. Show that every equiangular triangle is equilateral. In ∆PQR, PD ⊥ QR, such that D lies on QR. Solution: Question 9. Prove that DE || BC. In the given figure, BM and DN are perpendiculars to the line segment AC. Solution: Question 12. Show that ∆ABC ≅ ∆CDA. ∴ ∆ ACE ≅ ∆ BCD (ASA axiom) ∴ CE = CD (c.p.c.t.) Given 2. Solution: Question 14. If BM = DN, prove that AC bisects BD. Solution: No, it is not true statement as the angles should be included angle of there two given sides. In the given figure, ∠BCD = ∠ADC and ∠BCA = ∠ADB. 1+ 3 = 2+ 4. Calculate ∠ACE and ∠AEC. In ADB, AB 2 = AD 2 +BD 2 [Pythagoras theorem] AD 2 = AB 2 – BD 2 …(i) In ADC, AC 2 = AD 2 +CD 2 [Pythagoras theorem] AD 2 = AC 2 – CD 2 …(ii) Comparing (i) and (ii) AB 2 – BD 2 = AC 2 – CD 2. (ii) diagonal BD bisects ∠B as well as ∠D. Give reasons for your answer. aggarwal maths for class 9 icse, ml aggarwal class 9 solutions pdf download, ML Aggarwal ICSE Solutions, ML Aggarwal ICSE Solutions for Class 9 Maths, ml aggarwal maths for class 9 solutions cbse, ml aggarwal maths for class 9 solutions pdf download, ML Aggarwal Solutions, understanding icse mathematics class 9 ml aggarwal pdf, ICSE Previous Year Question Papers Class 10, ML Aggarwal Class 9 Solutions for ICSE Maths Chapter 10 Triangles, ml aggarwal class 9 solutions pdf download, ML Aggarwal ICSE Solutions for Class 9 Maths, ml aggarwal maths for class 9 solutions cbse, ml aggarwal maths for class 9 solutions pdf download, understanding icse mathematics class 9 ml aggarwal pdf, Concise Mathematics Class 10 ICSE Solutions, Concise Chemistry Class 10 ICSE Solutions, Concise Mathematics Class 9 ICSE Solutions, Letter to Bank Manager Format and Sample | Tips and Guidelines to Write a Letter to Bank Manager, Employment Verification Letter Format and Sample, Character Reference Letter Sample, Format and Writing Tips, Bank Account Closing Letter | Format and Samples, How to Write a Recommendation Letter? Construct triangle ABC given that AB – AC = 2.4 cm, BC = 6.5 cm. (a) In the figure (1) given below, ABC is an equilateral triangle. Solution: Question 4. <> (c) In the figure (3) given below, BA || DF and CA II EG and BD = EC . Find ∠ACB. Practising ML Aggarwal Solutions is the ultimate need for students who intend to score good marks in the Maths examination. Solution: Question 7. (a) In the figure (1) given below, find the value of x. Solution: Question 14. Reflexive Post. In ∆PQR, if ∠R> ∠Q, then (a) QR > PR (b) PQ > PR (c) PQ < PR (d) QR < PR Solution: In ∆PQR, ∠R> ∠Q ∴ PQ > PR (b). Which is (i) the greatest angle ? In ∆ABC, AB = AC, ∠A = (5x + 20)° and each of the base angle is $$\frac { 2 }{ 5 }$$ th of ∠A. (i) BG = DF (ii) EG = CF. In the given figure, BA ⊥ AC, DE⊥ DF such that BA = DE and BF = EC. Solution: Question 11. Solution: Filed Under: ICSE Tagged With: icse maths book for class 9 solved, m.l. In triangles ABC and DEF, ∠A = ∠D, ∠B = ∠E and AB = EF. Then the length of PQ is (a) 4 cm (b) 5 cm (c) 2 cm (d) 2.5 cm Solution: Question 11. P, Q and R are points on the sides AB, BC and CD respectively such that AP= BQ = CR and ∠PQR = 90°. Bisector of ∠A meets BC at D. Prove that BC = 2AD. Find ∠B and ∠C. Transcript. ML Aggarwal Solutions For Class 9 Maths Chapter 10 Triangles are provided here for students to practice and prepare for their exam. ABC is an isosceles triangle in which AB = AC. (b) In the figure (2) given below, AB = AC and DE || BC. In the given figure, AD, BE and CF arc altitudes of ∆ABC. In ∆PQR, ∠P = 70° and ∠R = 30°. In ∆PQR, ∠R = ∠P, QR = 4 cm and PR = 5 cm. ABCD is a rectanige. In the given figure, ∠ABC = ∠ACB, D and E are points on the sides AC and AB respectively such that BE = CD. Why? Give reason for your answer. Two line segments AB and CD bisect each other at O. Prove that BY = AX and ∠BAY = ∠ABX. ∆CBA ∆DBA 5. CE and DE bisects ∠BCD and ∠ADC respectively. Solution: Question 4. (a) In the figure (1) given below, AD bisects ∠A. In ∆ ABC, AB = 8 cm, BC = 5.6 cm and CA = 6.5 cm. Two sides of a triangle are of lenghts 5 cm and 1.5 cm. Show that BC = DE. Question 18. Solution: We have AE = AD and CE = BD, adding we get AE + CE = AD + BD. (c) In the figure (3) given below, AB || CD and CA = CE. In the given figure, AD = BC and BD = AC. (b) In the figure (2) given below, prove that ∠ BAD : ∠ ADB = 3 : 1. In the given figure, AB=AC and AP=AQ. This video explains the congruence criteria of … Analyze the diagram below. (a) In the figure (1) given below, prove that (i) CF> AF (ii) DC>DF. SOLUTION: Given: AB is congruent to DE, and BC is congruent to CD. Hence proved. AC = AE, AB = AD and ∠BAD = ∠CAE. Solution: Question 2. (Proof): Congruent Complements Theorem If 2 angles are complementary to the same angle, then they are congruent to each other. To Prove: (i) ABCD is a square. In the adjoining figure, AB || DC. Solution: Question 9. Given 2. 1 2 3. (iii) Is it possible to construct a triangle with lengths of its sides as 8 cm, 7 cm and 4 cm? A. ST ≅ ST by the reflexive property. In triangles AEB and ADC, we have AE = AD (given) AB = AC (proved) ∠EAB = ∠DAC (common angle) By SAS postulate ∆AEB ≅ ∆ADC. P is any point in the interior of ∆ABC such that ∠ABP = ∠ACP. Check all that apply. In the given figure, AD = BC and BD = AC. In parallelogram AFDE, we have: ∠A = ∠EDF (Opposite angles are equal) In parallelogram BDEF, we have: ∠B = ∠DEF (Opposite angles … Line segment BD bisects angle ABC Reason: Given 2. Consider the points A, B, C and D which form a cyclic quadrilateral. In the adjoining figure, O is mid point of AB. Solution: Question 8. In triangles ABC and PQR, ∠A= ∠Q and ∠B = ∠R. In the given figure, AP ⊥ l and PR > PQ. Solution: Question 2. Show that (i) ∆ACD ≅ ∆BDC (ii) BC = AD (iii) ∠A = ∠B. Given: ABCD is a rectangle in which diagonal AC bisects ∠A as well as ∠C. All rt are . If OB = 4 cm, then BD is (a) 6 cm (b) 8 cm (c) 10 cm (d) 12 cm Solution: Question 8. The two triangles are (a) isosceles but not congruent (b) isosceles and congruent (c) congruent but isosceles (d) neither congruent nor isosceles Solution: Question 12. In ∆ABC, BC = AB and ∠B = 80°. In each of the following diagrams, find the values of x and y. Then ∠C is equal to (a) 40° (b) 50° (c) 80° (d) 130° Solution: Question 9. Give reason for your answer. In the given figure, AB = DC and AB || DC. Question 12. (ii) Now, in triangles ABE and CBD, AB = BC (given) ∠BAE = ∠BCD [From (i)] AE = CD [From (ii)] ⇒ ΔABE ≅ ΔCBD ⇒ BE = BD (cpct) Concise Selina Solutions for Class 9 Maths Chapter 10- Isosceles Triangle Exercise 10(B) Page: 135 1. All the solutions of Areas of Parallelograms and Triangles - Mathematics explained in detail by experts to help students prepare for their CBSE exams. (a) SAS (b) ASA (c) SSA (d) SSS Solution: Criteria of congruency of two triangles ‘SSA’ is not the criterion. CA DA 6. C is joined to M and produced to a point D such that DM = CM. In the adjoining figure, AB = CD, CE = BF and ∠ACE = ∠DBF. Arrange AB, BD and DC in the descending order of their lengths. If PQ = a, PR = b, QD = c and DR = d, prove that (a + b) (a – b) = (c + d) (c – d). %���� endobj Is it true to say that BC = QR ? 3. Show that OCD is an isosceles triangle. Why? Solution: Question 9. In the given figure, D is mid-point of BC, DE and DF are perpendiculars to AB and AC respectively such that DE = DF. Produce AD to E, such that AD = DE. (1) (2) (3) Answer: (1) In QMP, QM QP = 3. => EC = DC or DC = EC Hence proved. AB AB 4. If the lengths of two sides of an isosceles are 4 cm and 10 cm, then the length of the third side is (a) 4 cm (b) 10 cm (c) 7 cm (d) 14 cm Solution: Lengths of two sides of an isosceles triangle are 4 cm and 10 cm, then length of the third side is 10 cm (Sum of any two sides of a triangle is greater than its third side and 4 cm is not possible as 4 + 4 > 10 cm. Transcript. Answer . Question 10. Solution: Given: In the figure , RST is a triangle. PQR is a right angle triangle at Q and PQ : QR = 3:2. DAB, ABC, BCD and CDA are rt 3. Show that in a right angled triangle, the hypotenuse is the longest side. Prove: ABC ADC Statement 1. CB BD 1. In ∆ABC and APQR, AB = AC, ∠C = ∠P and ∠B = ∠Q. ABC is an isosceles triangle with AB=AC. If XS⊥ QR and XT ⊥ PQ, prove that (i) ∆XTQ ≅ ∆XSQ (ii) PX bisects the angle P. (b) In the figure (2) given below, AB || DC and ∠C = ∠D. Show that ∆ABD ≅ ∆ACE. Prove that (i) ∆ABD ≅ ∆BAC (ii) BD = AC (iii) ∠ABD = ∠BAC. Reflexive 5. ID: A 2 6 ANS: Because diagonals NR and BO bisect each other, NX ≅RX and BX ≅OX.∠BXN and ∠OXR are congruent vertical angles. In the given figure, ∠BCD = ∠ADC and ∠BCA = ∠ADB. 4. Solution: Question 5. Solution: Question 13. CE and DE bisects ∠BCD and ∠ADC respectively. In the adjoining figure, AB=AC and AD is median of ∆ABC, then AADC is equal to (a) 60° (b) 120° (c) 90° (d) 75° Solution: Question 5. ∴ FE ∣∣ BC (By mid point theorem) Similarly, DE ∣∣ FB and FD ∣∣ AC.$\endgroup$– Blue Jun 16 at 13:45 endobj Example 10 In figure, ∠ ACB = 90° and CD ⊥ AB. R S Aggarwal and V Aggarwal Solutions for Class 9 Mathematics CBSE, 11 Areas of Parallelograms and Triangles. Solution: Question 1. (b) In the figure (ii) given below, O is a point in the interior of a square ABCD such that OAB is an equilateral trianlge. If triangle PQR is right angled at Q, then (a) PR = PQ (b) PR < PQ (c) PR < QR (d) PR > PQ Solution: Question 17. In the given figure, ∠ABC = ∠ACB, D and E are points on the sides AC and AB respectively such that BE = CD. In triangles ABC and PQR, ∠A = ∠Q and ∠B = ∠R. Question 1. (a) In the figure (i) given below, CDE is an equilateral triangle formed on a side CD of a square ABCD. In figure given alongside, ∠B = 30°, ∠C = 40° and the bisector of ∠A meets BC at D. Show (i) BD > AD (ii) DC > AD (iii) AC > DC (iv) AB > BD Solution: Question 7. Solution: Question 1. Solution: Question 7. Page No 274: Question 1: In a ΔABC, AB = AC and ∠A = 50°. Ex 8.1, 12 ABCD is a trapezium in which AB CD and AD = BC . Solution: Question 12. Then the rule by which ∆AFE = ∆CBD is (a) SAS (b) ASA (c) SSS (d) AAS Solution: Question 3. In ∆ ABC, B C 2 = A B 2 + A C 2 ⇒ B C 2 = x 2 + x 2 ⇒ B C 2 = 2 x 2 ⇒ B C = 2 x 2 ⇒ B C = x 2 Now, B D A D = B C A C (An angle bisector of an angle of a … Question 3. If AB = FE and BC = DE, then (a) ∆ABD ≅ ∆EFC (b) ∆ABD ≅ ∆FEC (c) ∆ABD ≅ ∆ECF (d) ∆ABD ≅ ∆CEF Solution: In the figure given. 4.Triangle ABC is isosceles Reason: Def of isosceles triangle 5. A unique triangle cannot be constructed if its (a) three angles are given (b) two angles and one side is given (c) three sides are given (d) two sides and the included angle is given Solution: A unique triangle cannot be constructed if its three angle are given, (a). Solution: Question 10. “If two angles and a side of one triangle are equal to two angles and a side of another triangle, then the two triangles must be congruent”. If triangle ABC is obtuse angled and ∠C is obtuse, then (a) AB > BC (b) AB = BC (c) AB < BC (d) AC > AB Solution: Question P.Q. In the given figure, ∠BCD = ∠ADC and ∠BCA = ∠ADB. AB 2 + CD 2 = AC 2 + BD 2. REF: 080731b 7 ANS: Parallelogram ANDR with AW and DE bisecting NWD and REA at points W and E (Given).AN ≅RD, AR ≅DN (Opposite sides of a parallelogram are congruent).AE = 1 2 AR, WD = 1 2 DN, so AE ≅WD (Definition of bisect and division … Solution: Question 8. In the following diagrams, find the value of x: Solution: Question 5. Which statements regarding the diagram are correct? Show that: (i) ∆DBC ≅ ∆ECB (ii) ∠DCB = ∠EBC (iii) OB = OC,where O is the point of intersection of BE and CD. <>/XObject<>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> In the given figure, AB = AC and D is mid-point of BC. Prove that, . Solution: Question 4. A ABC A ADC = AD × BC AD × DC = BC DC (iv) A ADC A PQC = AD × DC PQ × QC.$\begingroup$You should show your proof for the special case. In the given figure, ABCD is a square. Related Videos. Solution: Question 8. If BP = RC, prove that: (i) ∆BSR ≅ ∆PQC (ii) BS = PQ (iii) RS = CQ. Students facing trouble in solving problems from the Class 9 ML Aggarwal textbook can refer to our free ML Aggarwal Solutions for Class 9 provided … Now, in right-angled ∆ ABC and ∆ DEF, Hyp. In the given figure. Prove that AB = CD. Prove that ∠ADB = ∠BCA. Prove that : ∠ADB = ∠BCA and ∠DAB = ∠CBA. (c), Question P.Q. If AB > AC, show that AB > AD. (c). (a) In the figure (i) given below, ∠B < ∠A and ∠C < ∠D. Solution: Question 3. Given S 5. Answer: Given: AB = AC and ∠A = 50° To Find: ∠B and ∠C. 1 0 obj If ∠ACE = 74° and ∠BAE =15°, find the values of x and y. Plus, showing your work lets readers know what tools and techniques you are comfortable using, which can help answerers avoid explaining things you already know or using approaches beyond your skill level. (b)In the figure (2) given below, BC = CD. (i) Given, AD = EC ⇒ AD + DE = EC + DE (Adding DE on both sides) ⇒ AE = CD …. It is not possible to construct a triangle when the lengths of its sides are (a) 6 cm, 7 cm, 8 cm (b) 4 cm, 6 cm, 6 cm (c) 5.3 cm, 2.2 cm, 3.1 cm (d) 9.3 cm, 5.2 cm, 7.4 cm Solution: We know that sum of any two sides of a triangle is greater than its third side 2.2 + 3.1 = 5.3 ⇒ 5.3 = 5.3 is not possible (c), Question 15. Solution: Question 13. Question 4. Therefore BNX ≅ ORX by SAS. RQ RQ Side 3. Prove that (a) ∆PBQ ≅ ∆QCR (b) PQ = QR (c) ∠PRQ = 45° Solution: Question 3. Question 12. (ii) the smallest angle ? <> Prove that AD bisects ∠BAC of ∆ABC. Give reason for your answer, (ii) Is it possible to construct a triangle with lengths of its sides as 9 cm, 7 cm and 17 cm? Triangle ADC is isosceles Reason: Triangle ABC is isosceles which makes triangle … In ∆ADB and ∆EDC, we have BD = CD, AD = DE and ∠1 = ∠2 ∆ADB ≅ ∆EDC AB = CE Now, in ∆AEC, we have AC + CE > AE AC + AB > AD + DE AB + AC > 2AD [∵ AD = DE] Triangles Class 9 Extra Questions Short Answer Type 1. [Hint:- use the concept of alternate angles.] stream QT bisects PS 1. In the adjoining figure, AC = BD. In the given figure, ABCD is a quadrilateral in which AD = BC and ∠DAB = ∠CBA. Show that AR > AQ. Answer: ∆ ABC is shown below.D, E and F are the midpoints of sides BC, CA and AB, respectively. Find the values of x, y and ∠. Give reason for your answer. Defn Midpoint 4. In the adjoining figure, TR = TS, ∠1 = 2∠2 and ∠4 = 2∠3. If ∠ABD = 36°, find the value of x . Base BC is produced to E, such that BC’= CE. Given 2. Example 2: In the figure, it is given that AE = AD and BD = CE. Show that AD < BC. To Prove: (i) ABCD is a square. �)�F%Vhh+��15���̑��:oG�36���;�e;���kM$���0 ��ph&}�|�&��*?��[email protected]��*d�SKB�+��YN ���wLx7����4.��#PZ�\$��}��;��t��� 1�g���g���鰡-�J&��)�V�h�*@�P�&5���g)Ps(�l�YU��Yk��A�;��*�l�@��B47}�w:n�-�MW? Answer 8. PQR RQS Reasons 1. (b) In the figure (2) given below, AB = AC. B. ASA. Which side of this triangle is longest? ∠ ACD and state ( giving Reasons ) which is greater: BD or DC =.! Not true statement as the angles should be equal to side BC of ∆ABC such that =. Ac of ∆ ABC a ) in the figure, ∠BCD = ∠ADC and ∠BCA = ∠ADB on a CD. ⊥ l and M are two parallel lines P and Q are points on sides AD given ad=bc and bcd = adc prove de ce brainly. Cm, ∠ b = 75° and height = 4.2 cm not true as! 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