Intro to Geometry Vocab

Front

Right angle?

Back

90 degrees

Front

Acute angle

Back

Measures < 90°

Front

Obtuse angle:

Back

Measures > 90° and < 180°.

Front

Straight angle?

Back

Measures exactly 180 degrees.

Front

Two angles that add to 180°.

Back

supplementary

Front

Two angles that add up to 90.

Back

complementary

Front

Meaning of the math symbol?

Back

Congruent

Front

Opposite congruent angles formed by intersecting lines.

Back

Vertical Angles

Front

Types of lines: line, ray, line segment

Back

line segment

Front

Identify the type of geometric figure:

Back

line