Geometry & Angles
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What you'll learn
Angles measure turning. A few angle facts let you find unknown angles.
- Angles are measured in **degrees** (°). A right angle is \(90°\).
- Angles on a **straight line** add up to \(180°\).
- Angles at a **point** add up to \(360°\).
- **Vertically opposite** angles, where two straight lines cross, are equal.
- The three angles of a **triangle** add up to \(180°\).