Q.If the angles of a triangle are in the ratio 1:2:3, then the smallest angle in radian is
A) $\dfrac{\pi}{3}$ B) $\dfrac{\pi}{6}$ C) $\dfrac{\pi}{2}$ D) $\dfrac{\pi}{9}$

Step 1: Ratio parts sum to $1+2+3=6$; smallest angle $=\frac{180°}{6}=30°$. …

Split the triangle angle sum (180°) in the given ratio and convert …

• Taking the LARGEST ratio share (3 parts) instead of the smallest (1 part). …