Indicate which pairs of angles are:

(i) Vertically opposite angles.

(ii) Linear pairs.

(i) Following pairs of vertically opposite angles are as follows:

∠1 and ∠4

Also,

∠5 and ∠2 + ∠3

These all are pairs of vertically opposite angles because these are formed due to the intersection of two straight lines

(ii) Following pairs of linear pairs are as follows:

∠1 and ∠5

Also,

∠5 and ∠4

These all pairs are linear pairs because these all have a common vertex and their non – common arms are opposite to each other

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