Geometry Vocabulary

Front

Figures or objects with the same size and shape.

Back

Congruent

Front

The point on the line segment that divides it into two segments of equal length.

Back

Midpoint

Front

Two different lines which do not share any points (no points of intersection).

Back

Parallel lines

Front

Facts that we take as being true without being able to prove or disprove them.

Back

Axioms

Front

A line, segment, or ray that divides an angle into two congruent angles (two angles with the same measure).

Back

Angle bisector

Front

A portion of a circle or subset of points that lie on a circle.

Back

Arc

Front

The collection (or set) of all points that are a fixed distance away from a fixed point.

Back

Circle

Front

Two angles whose measures add up to 180 degrees.

Back

Supplementary

Front

Has a measure between 180 degrees and 360 degrees.

Back

Reflex angle

Front

The geometric object created by two rays with a common starting point.

Back

Angle