Question

In the figure below, lines AB and CD intersect each other at point O. The angle pairs ( $\angle$AOD, $\angle$COB) and ( $\angle$AOC, $\angle$BOD) are called ___.

• A. vertically opposite angles
• B. opposite interior angles
• C. corresponding angles
• D. adjacent pair angles

Answer 1

The correct option is A

vertically opposite angles

$\angle AOC=\angle BOD\text{[vertically opposite angles]}$

And,

$\angle AOD=\angle BOC\text{[vertically opposite angles]}$