Lines and intersect at to form four angles ,

MATHEMATICS · Single correct · CBSE · Mathematics · Lines and Angles · Lines and Angles

Problem

Lines

AB

and

CD

intersect at

O

to form four angles

\angle AOC

\angle COB

\angle BOD

and

\angle DOA

. Which one of the following pairs of angles are vertically opposite? (a)

\angle AOC \text{ and } \angle DOA

(b)

\angle COB \text{ and } \angle BOD

(c)

\angle AOC \text{ and } \angle BOD

(d)

\angle DOA \text{ and } \angle BOD