Unit 1 Test Vocabulary

Front

A line, ray, or segment that divides an angle or segment into two equal parts.

Back

Bisector

Front

Congruent angles that are across from each other on intersecting lines.

Back

Vertical Angles

Front

An angle whose measure is between 0° and 90°.

Back

Acute Angle

Front

The point that divides a line segment into two congruent segments.

Back

Midpoint

Front

Two lines that intersect at a 90° angle.

Back

Perpendicular Lines

Front

A pair of angles that add up to 180°.

Back

Supplementary Angles

Front

A pair of angles that add up to 90°.

Back

Complementary Angles

Front

An angle that measures exactly 90°.

Back

Right Angle

Front

A line that intersects two or more lines at different points.

Back

Transversal

Front

Two lines that never intersect and are always the same distance apart.

Back

Parallel Lines