In the given figure, l || m and p || q. Find the angles x, y and z.

In each of the following figures, two lines AB and CD are cut by a transversal EF. In each case, find whether AB || CD or not. Give reasons in support of your answer.

(i)

(ii)

(iii)

(iv)

(v)

The sum of a linear pair of angles is

1. 0°
2. 90°
3. 180°
4. 360°

Vertically opposite angles

1. are complementary
2. are supplementary
3. are equal
4. form a linear pair