Indicate which pairs of angles are:
$(i)$ Vertically opposite angles.
$(ii)$ Linear pairs.
"
To do:
We have to indicate which pairs of angles are:
(i) Vertically opposite angles.
(ii) Linear pairs.
Solution:
Vertically opposite angles are the angles that are formed by the intersection of two straight lines.
A linear pair is defined as two adjacent angles that add up to
$180^o$.
Therefore,
(i) Vertically opposite angles are $\angle 1$ and $\angle 4;\ \angle 5$ and $(\angle 2+\angle 3)$
(ii) Linear pairs are $\angle 1$ and $\angle 5$, $\angle 5$ and $\angle 4$.
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