Question

Find the supplement of the angle :

$\frac{2}{5}$ of a right angle

• A. $124$
• B. $144$
• C. $154$
• D. $98$

Answer 1

The correct option is B $144$

Two angles are supplementary if their sum is ${180}^0$.

If one angle is $\frac{2}{5}$ of a right angle, then other angle is $180-(\frac{2}{5}\times 90)=180-(2\times 18)=180-36={144}^0$.