How to opposite sides of a parallelogram are congruent.

TRIANGLES Solutions for Class 9th Maths.

9th Maths EXERCISE 7.1,Page No:118, Questions No:1

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In ΔACB and ΔADB,

AC = AD [∵ Given]

∠CAB = ∠DAB [∵ AB bisects angle A]

AB = AB [∵ Common]

Hance, ΔABC ≅ ΔABD [∵ SAS Congruency Rule]

BC = BD [∵ Corresponding parts of congruent triangles are equal]