Exercise 5.1

Identify which pairs of angles are vertically opposite angles.

In the following figure, is $\mathit{\angle }1\mathit{}$ adjacent to $\mathit{\angle }2$ Give reasons.

Find the values of the angles $\mathbf{x},\mathbf{}\mathbf{y},\mathbf{}$and $\mathbf{}\mathbf{z}$ in each of the following:

Find the values of the angles $\mathbf{x},\mathbf{}\mathbf{y},\mathbf{}$and $\mathbf{}\mathbf{z}$ in each of the following:

If two angles are complementary, then the sum of their measures is _____ degree.

If two angles are supplementary, then the sum of their measures is _____$°$.

If two adjacent angles are supplementary, they form a _____.

If two lines intersect at a point, then the vertically opposite angles are always _____.