Question

Answer the following with respect to the figure:

(a) Nature of lines
(b) Rays
(c) Angles formed
(d) Verlically opposite angles
(e) $\angle COB={65}^{\circ }$ then $\angle AOD$ is ?
(f) A pair of supplementary angles

Answer 1

(a) These are intersecting lines
(b) $\overrightarrow{OA},\overrightarrow{OB},\overrightarrow{OC},\overrightarrow{OD}$
(c) $\angle AOD,\angle AOC,\angle COB,\angle COD,\angle AOB$
(d)$\begin{array}{c}\text{1st pair:}\angle AODand\angle COB\text{(Opposite to each other)}\\ \text{2nd pair:}\angle AOCand\angle DOB.\text{(Opposite to each other)}\end{array}$
(e) $\angle AOD={65}^{\circ }\text{(vertically opposite angles are equal)}$
(f)$\begin{array}{c}\text{1st pair:}\angle COAand\angle AOD\\ \text{2nd pair:}\angle AODand\angle DOB\end{array}$