Question

if one angle of a triangle is equal to the sum of other two , show that the triangle is the right triangle .

Answer 1

here is solution of your questions

Answer 2

Let the equal angles be X

So the bigger angle =. X+X=2x

Now , X+X+2x=180° (angle sum property of triangle)

4x=180

X= 180/4

X= 45°

2x =90°

Hence proved