Question

Calculate the size of angle 0

A= 100
B=80
C=138
D= 42
Show your workings out.

Answer 1

The angle that is supplementary to the
`\theta` and the angle
`42^(\circ)` are corresponding angles.

Therefore

`\theta=180^(\circ)-42^(\circ)=138^(\circ)\Rightarrow \text{C}`