Complementary angles are two angles whose measures add up to $90$ degrees. Imagine a right angle (like the corner of a square); if you split that corner into two smaller angles, those two angles are complementary! Understanding this simple relationship can help you solve many geometry problems.
In this worksheet, we'll test your knowledge of complementary angles through vocabulary matching, fill-in-the-blanks, and a critical thinking question. Get ready to put your angle skills to the test!
Match each term with its definition:
| Term | Definition |
|---|---|
| 1. Complementary Angles | A. An angle that measures $90$ degrees. |
| 2. Right Angle | B. The point where two lines meet to form an angle. |
| 3. Angle | C. Two angles whose measures add up to $90$ degrees. |
| 4. Vertex | D. The amount of turn between two lines around a common point. |
| 5. Degree | E. A unit of angular measure, where a full rotation is $360$ degrees. |
Complete the following sentences:
Explain how you can determine if two angles are complementary without using a protractor.
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