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# Angle Measure

Angle Measure. Section 1-4. angle – a figure consisting of 2 noncollinear rays with a common endpoint. The 2 rays are called the sides of the angle. The common endpoint is called the vertex. A ray extends indefinitely in one direction.

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## Angle Measure

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### Presentation Transcript

1. Angle Measure Section 1-4

2. angle – a figure consisting of 2 noncollinear rays with a common endpoint. The 2 rays are called the sides of the angle. The common endpoint is called the vertex.

3. A ray extends indefinitely in one direction. A ray has exactly one endpoint and that endpoint is always used first when naming the ray. A B

4. interior exterior An angle separates a plane into 3 parts, the interior of the angle, the exterior of the angle, and the angle itself.

5. A The sides of the angle are. The vertex is B. You could name this angle as 1 B C

6. Right angle = 900 Acute angle < 900 Obtuse angle > 900

7. Angle Bisector – a ray that divides an angle into 2 congruent angles Angles that have the same measure are congruent. Angle bisector 1 2

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