| A | B |
|---|
| Acute Angle | An angle whose measure is less than 90 degrees. |
| Right Angle | An angle whose measure is 90 degrees. |
| Obtuse Angle | An angle whose measure is more than 90 degrees. |
| Straight Angle | An angle whose measure is 180 degrees. |
| Angle | Formed by two rays that have the same endpoint |
| Vertex | The common endpoint of two rays. |
| Protractor | You use this tool to measure and draw angles. |
| Degrees | Angles are measured in this unit |
| 60 degrees | Example of an acute angle |
