Geometry Vocabulary

measure between 180 degrees and 360 degrees

• acute angle

• obtuse angle

• right angle

• straight angle

• reflex angle

Angles next to each other sharing a common ray and not overlapping

• complementary angles

• adjacent angles

• supplementary angles

• vertical angles

• linear pairs

Two angles whose sum is 90 degrees

• complementary angles

• adjacent angles

• supplementary angles

• vertical angles

• linear pairs

Two angles whose sum is 180 degrees

• Complementary angles

• Adjacent angles

• supplementary angles

• vertical angles

• linear pairs

Two angles that form a line

• complementary angles

• adjacent angles

• supplementary angles

• vertical angles

• linear pairs

Two angles that are congruent created when two lines intersect.

• complementary angles

• adjacent angles

• supplementary angles

• vertical angles

• linear pairs

Lines that form right angles are

• segment bisectors

• perpendicular lines

• Perpendicular bisectors

• angle bisectors

• midpoint

A point dividing a line segment in two congruent segments is a

• segment bisector

• perpendicular lines

• perpendicular bisector

• angle bisector

• midpoint

A line that divides a line segment into two congruent segments

• segment bisector

• perpendicular lines

• perpendicular bisector

• angle bisector

• midpoint

A figure created by two distinct rays that share a common endpoint (also known as a vertex). ABC or B or CBA indicate the same angle with vertex B.

• Side

• Angle

• Bisector

• Circle