Question

In a Δ ABC, if ∠A+∠B=∠C, Can we say that the triangle is isosceles, Why or Why not?

Answer 1

Answer:

No.

A+B=C

add C on both sides

A+B+C = C+C=2C =180

C=90

A+B=90

It will be isosceles if A=B=45

otherwise sum of A and B has to be 90