Question

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

Answer 1

I don't know bro sorry I dont help you..... Sorry

Answer 2

Let the angles of triangle be x

one angles of a triangle is equal to the sum of other two so ( x+x) will be first angle

ATQ

( x +x) +x+x = 180 ( sum of all angles of triangle =180)

2x +x +x = 180

4x = 180

x = 180 / 4

x = 45°

therefore

first angle = x + x

= 45 + 45

= 90°

Second angle = 45°

third angle = 45°

one angle = 90°

Hence, prooved.