Geometry Foundations Vocab

An angle that measures greater than 0º and less than 90º

• acute angle

• obtuse angle

• right angle

• straight angle

Two angles in the same plane with a common vertex and a common side, but no common interior points.

• Adjacent Angles

• Exterior Angle

• Complementary Angles

• Vertical Angles

A figure formed by two rays with a common endpoint

• angle

• point

• line

• polygon

A ray that divides an angle into two congruent angles

• Angle Bisector

• Vertex

• Midpoint

• Perpendicular Bisector

Points that lie on the same line

• Coincide

• Collinear

• Coplanar

• Circumference

Two angles whose measures have a sum of 90°

• Linear Pair

• Complementary Angles

• Supplementary Angles

• Vertical Angles

Having the same size and shape, (check all that apply)

• Congruent

• ≅

• =

• Similarity

Points that lie in the same plane

• coplanar

• collinear

• copilot

• congruent

A point at the end of a segment or the starting point of a ray

• collinear

• endpoint

• vertex

• A

a straight path that has no thickness and extends forever

• point

• line

• ray

• plane