Question

How many pairs of vertical angles are formed by two intersecting lines?

• A. $1$
• B. $2$
• C. $4$
• D. None of the above

Answer 1

The correct option is B $2$

First we will draw a figure of two intersecting lines.
$\underset{–}{\text{Vertical Angles:}}$
Vertical angles are the pairs of opposite angles made by intersecting lines.

In the above figure, the pairs of vertical angles are:
$\bullet$$\angle 1$ and $\angle 3$
$\bullet$$\angle 2$ and $\angle 4$

Thus, 2 pairs of vertical angles are formed by two intersecting lines.

So, option(b.) is correct.