# Angles on a Straight Line Worksheets

There are six sets of angle worksheets:

Examples, solutions, videos, and worksheets to help grade 6 learn how to find unknown angles that are on a straight line.

### How to use the angle on a straight line property?

In geometry, when two or more angles share a common vertex and a common side and are positioned in such a way that they form a straight line, those angles are said to be “angles on a straight line” or “linear angles.” Linear angles always add up to 180 degrees because they together form a straight line, which is a half-turn or 180-degree rotation.

For example, if you have three angles, ∠A, ∠B, and ∠C that share a common vertex and side and are positioned in a straight line, you can say:

∠A + ∠B + ∠C = 180 degrees

This property is also known as the “straight angle property.” It is often used to solve problems involving angles in geometry. It can be used to find unknown angles on a straight line.

Have a look at this video if you need to review how to find unknown angles in a straight line.

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Angles on a Straight Line Worksheet (find unknown angles)

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