Question

5. Identify two linear pairs and two pairs of
vertically opposite angles in Fig. 9.13.​

Answer 1

Linear pair of angles are angles that form a straight line

angles 1,5 and 4,5 form a linear pair

vertically opposite angles are angles that are opposite each other in 2 intersecting lines.

angles 1,4 and 2+3, 5 are vertically opposite angles

note:- 2,5 or 3,5 are not vertically opposite angles but angle 2 combined with angle 3 is vertically opposite of angle 5

Thank you

Answer 2

angle 1 and 5 , 4 and 5 form linear pair

&

angle 1 and 4 , 2+3 and 5 form vertically opposite angle