Question

In the adjoining diagram, BM = CN Prove that triangle ABC is isosceles.​​

Answer 1

Answer:

Here

In Triangle NCB and MCB,

angleN = angleM (90 degree)

BM = CN ( Given )

BC = BC (Common)

BY RHS BOTH THE TRIANGLES ARE CONGRUENT....

BY CPCT

angleACB = angleABC

IF IN A TRIANGLE TWO ANGLES ARE EQUAL THEN THEY ARE ISOSCELES.

HENCE, PROVED.

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