Basic Geometry Terms

Front

Parallel lines

Back

Two lines that never intersect (cross over).

Tags

CCSS.HSG.CO.A.1

Front

Perpendicular lines

Back

Lines that intersect to form square (right) angles.

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

Front

Quadrilateral

Back

A shape with exactly four sides and four vertices.

Tags

CCSS.2.G.A.1

Front

Ray

Back

A part of a line with one endpoint and continues endlessly in one direction.

Tags

CCSS.4.G.A.1

Front

Symmetry

Back

When an object looks the exact same on one side as the other when cut in half.

Tags

CCSS.4.G.A.3

Front

Parallelogram

Back

A quadrilateral with two pairs of parallel sides.

Tags

CCSS.3.G.A.1

Front

Intersecting lines

Back

Lines that pass through the same point.

Tags

CCSS.HSG.CO.A.1

Front

Line segment

Back

A part of a line that has two endpoints.

Tags

CCSS.HSG.CO.A.1

Front

Point

Back

An exact position.

Tags

CCSS.HSG.CO.A.1