Question

If $\angle a$ and $\angle b$ form a linear pair and $\angle a$ is a right angle, then, $\angle b$ will be a/an angle.

• A. acute
• B. right
• C. reflex

Answer 1

The correct option is B right


Let us assume $\angle ANM=\angle a$ and $\angle BNM=\angle b$.
Given, $\angle a$ and $\angle b$ form a linear pair and $\angle a=90°$

Then, $\angle a+\angle b=180°$
$\Rightarrow 90°+\angle b=180°$
$\Rightarrow \angle b=180°-90°=90°$

Hence, the value of $\angle b=90°$