Geo Vocabulary

Two angles with measures that sum to 90 degrees

• complementary angles

• linear pair

• straight angle

• supplementary angle

A segment, line or plane that divides a segment into 2 congruent pieces.

• angle bisector

• perpendicular bisector

• segment bisector

A segment, line or ray perpendicular to a segment at its midpoint.

• angle bisector

• perpendicular bisector

• segment bisector

Two angles directly across from each other on intersecting lines

• complementary angles

• supplementary angles

• vertex

• vertical angles

A common endpoint of an angle

• adjacent angle

• angle bisector

• vertex

Two angles that share a common side and vertex

• adjacent angles

• complementary angles

• straight angle

• supplementary angles

Two angles with measures that sum to 180 degrees

• adjacent angles

• complementary angles

• supplementary angles

Adjacent angles that are supplementary

• complementary angles

• linear pair

• straight angles

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

• angle bisector

• perpendicular bisector

• segment bisector

An angle with a degree measure of 180 degrees

• acute angle

• obtuse angle

• right angle

• straight angle