Question

In a linear pair, there are two angles which have

• A. Common vertex
• B. Common side
• C. Sum of angles is ${90}^{\circ }$
• D. Sum of angles is ${180}^{\circ }$

Answer 1

Answer: (A), (B), (D)

Sum of angles is ${180}^{\circ }$

In a linear pair, there are two angles which have
$\bullet$ Common vertex
$\bullet$ Common side
$\bullet$ Sum of angles is ${180}^{\circ }$


In the figure shown above, $\angle 1$ and $\angle 2$ have:
$\bullet$ Common vertex $O$
$\bullet$ Common side $OB$
$\bullet$ Sum of angles $\angle 1$ and $\angle 2$ is ${180}^{\circ }$

$\therefore \angle 1$ and $\angle 2$ form a linear pair.

Therefore, options (a.), (b.) and (d.) are the correct answers.