Question

In the following figure, write, if any, (i) each pair of vertically opposite angles, and (ii) each linear pair.

Answer 1

Vertically opposite angles are the angles, opposite to each other when two lines cross, A linear pair is a pair of adjacent angles whose non-common sides are opposite rays.

Following are vertically opposite angles and linear pair in the above figure:

Figure	Vertically opposite angles	Linear pair
	∠1, ∠3; ∠2, ∠4; ∠5, ∠7; ∠6, ∠8	∠1, ∠2; ∠1, ∠4; ∠4, ∠3; ∠3, ∠2; ∠5, ∠8; ∠8, ∠7; ∠7, ∠6, ∠6, ∠5