Question

1Measure of angle aº?20639boFind the value for bºp 614)Measure of angle cº? 1

Answer 1

When two lines intersect, then two pairs of vertically opposite angles are formed and they are equal.

Angles 63° and b° are vertically opposite angles.

This means that angle b = 63°

Similarly, angles a° and c° are vertically opposite angles meaning that they are equal.

a° = c°

The measure of angles a and c is

`\angle a=\angle c=180\degree-63\degree=117\degree`

Therefore, angles a = c = 117°