Question 131

Two angles of a triangle are a radian and 1/3 radian. The measure of the third angle in degree (taking π = 22/7 ) is :

1 radian = (180/π)°
SO, 1/2 radian = (90/π)° & 1/3 radian = (60/π)°
Sum of three angles of a triangle is 180° ∴ (90/π) + (60/π) + x = 180
x = 180 - (150/π)
Putting π = 22/7 ,
x = $$132 \frac{3}{11}^{\circ}$$

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