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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 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. A ray has exactly one endpoint and that endpoint is always used first when naming the ray. A B
interior exterior An angle separates a plane into 3 parts, the interior of the angle, the exterior of the angle, and the angle itself.
A The sides of the angle are. The vertex is B. You could name this angle as 1 B C
Right angle = 900 Acute angle < 900 Obtuse angle > 900
Angle Bisector – a ray that divides an angle into 2 congruent angles Angles that have the same measure are congruent. Angle bisector 1 2