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

Step-by-step explanation:

let first angle be 2x

let second angle be x

let third angle be x

2x+x+x=180°

4x=180°

x=180÷4

x=45°

first angle=2x=2×45=90

second angle=x=45

third angle=x=45