Question

The following figures are not drawn to scale but AB and CD are straight lines.
Find x.

Answer 1

Answer:

x = 30

Step-by-step explanation:

2x + 90° + x = 180°

3x + 90° = 180°

3x = 90°

x = 90/3

x = 30

Answer 2

Answer:

30

Step-by-step explanation:

90° + x + x+ x = 180  {Straight line angles}

90 + 3x = 180

Subtract 90from both sides

3x = 180- 90

3x = 90

Divide both sides by 3

x = 90/3

x = 30