Question

In the figure below, lines AB and CD intersect each other at point O. The angle pairs ( $\angle AOD$ and $\angle COB$) and ( $\angle AOC$ and $\angle BOD$) 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 [vertically opposite angles]

And, $\angle$AOD = $\angle$BOC [vertically opposite angles]