Geometry 1.5 Angles and Their Measure

Front

Angle

Back

Consist of two different rays with a common endpoint.

Front

Sides of an angle

Back

are called rays

Front

Vertex

Back

Common endpoints of an angle

Front

Vertex must be in the middle when...

Back

naming an angle using 3 points

Front

Interior of an angle...

Back

contains all points between the two side of an angle.

Front

Exterior of an angle...

Back

Contains all points that are NOT in the interior of the angle and are NOT on the angle.

Front

Acute angle

Back

Less then 90 degrees

Front

Right angle

Back

90 degrees

Front

Obtuse angle

Back

greater than 90, but less than 180

Front

Straight Angle

Back

180 degrees