Question

One angle is=60°second angle is twice than third angle

Answer 1

let the third angle be x

hence the second angle is 2x

2x + 60 = 180 (angle sum Property of triangle)

therefore
2x = 180-60
2x = 120
x = 120/2
x= 60

the second angle is 2x = 2(60) = 120°

the third angle is x = 60°