Geometry Vocab

Front

Adjacent:

Back

Two angles that are next to each other.

Front

Vertical angles are:

Back

Two angles across from each other on intersecting lines; always congruent.

Front

Congruent

Back

the same

Front

Complementary angles

Back

Sum to 90 degrees

Front

Right Angle

Back

90 degrees

Front

Acute Angle

Back

less than 90 degrees

Front

Obtuse Angle

Back

angle > 90°

Front

Reflex Angle

Back

An angle > 180°

Front

Vertex

Back

The point where two rays intersect.

Front

Radius

Back

Distance from the center of a circle to a point on the circle.