Question

Solve x for the diagram below.

Answer 1

x = 20

Explanation:

Vertical Angles are the angles opposite each other when two lines cross.

We have the vertical angles. Vertical angles are congruent. Therefore the angle measures are equal.

We have the equation:

x + 40 = 60 subtract 40 from both sides

x + 40 - 40 = 60 - 40

x = 20

Answer 2

x=20

Explanation:

The angles are opposites, so they should be equal.

60=x+40

x=60-40

x=20