👉 Learn how to find the value of an unknown variable in the expressions representing the values of angles given the ...

👉 Learn how to define angle relationships. Knowledge of the relationships between angles can help in determining the value ...

Angles that add together to make a straight line are called supplementary angles. If you know one supplementary angle you can subtract it from 180° to find a missing angle.

\(x\) is 50°. Corresponding angles are equal. \(y\) is 180° - 50° = 130°. Angles on a straight line add up to 180°.