Question

In a triangle one angle is twice the other and their sum is the third angle. The angles
are :
A) 30°, 60°, 90°
C) 40°, 80°, 120°
B) 200, 40°, 60°
D) none of these

Answer 1

Step-by-step explanation:

let one angle is x°

2nd angle =2x°

3rd angle =(x+2x)°=3x°

sum of the three angles of a triangle is 180°

so,

x°+2x°+3x°=180

=> 6x=180

=> x=180/6=30

so the angles are 30°,60°,90°