Question

one of the angle of a triangle is 3π/10 and the other one is 66° ,then the third angle is radian is

Answer 1

We know that the sum of the three angles in a triangle is 180°

The first angle is 3π/10 radians which converts to 54° (just substitute π radians = 180° to get this answer).
The other angle is 66°
Let the third angle be x
So totally, 54° + 66° + x = 180°
120° + x = 180°
x= 180 - 120 = 60° = π/3 radians

Therefore, the required answer is (B) that is π/3 radians

Answer 2

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