Question

The following angles are supplementary to each other.

m∠C = (2x + 18)° and m∠D = (3x − 18)°

Determine x.

Answer 1

x = 36°

Explanation:

Hello!

If angles are supplementary, that means that the sum of those angles is 180°.

Set up an equation and solve for x.

Solve for x

• 2x + 18 + 3x - 18 = 180
• 5x = 180
• x = 36

The measure of x is 36°.