Geometry Vocabulary

Front

Perpendicular

Back

Two lines that intersect at a right angle.

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

Front

Segment

Back

Measurable part of a line consisting of two endpoints.

Tags

CCSS.HSG.CO.A.1

Front

Congruent

Back

Identical in form.

Tags

CCSS.8.G.A.2

Front

Parallel

Back

Two lines that never touch.

Tags

CCSS.HSG.CO.A.1

Front

Angle Addition Postulate

Back

If point B is in the interior of angle AOC, then the measure of angle AOB + the measure of angle BOC = the measure of angle AOC.

Tags

CCSS.4.MD.C.7

Front

Segment Addition Postulate

Back

If point B is between points A and C, then AB + BC = AC.

Front

Ray

Back

A part of a line that starts at one point and extends infinitely in one direction.

Tags

CCSS.4.G.A.1

Front

Line

Back

A straight path that extends infinitely in both directions.

Tags

CCSS.4.G.A.1

Front

Point

Back

A location with no shape or size.

Tags

CCSS.4.G.A.1

Front

Bisector

Back

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

Tags

CCSS.HSG.CO.A.1