Basic Geometry Terms - Unit 1

Front

Point

Back

location in space, no size or dimension

Front

Line

Back

Made up of points with no thickness or width, extending in opposite directions with no end

Front

Line segment

Back

measurable part of a line consisting of two endpoints.

Front

Ray

Back

of a line with one endpoint, extends infinitely in one direction

Front

Plane

Back

a flat surface made up of points and extends infinitely in all directions

Front

Collinear points

Back

points that lie on the same straight line

Front

Coplanar points

Back

lying on the same plane

Front

Angle

Back

formed by two rays with a common endpoint

Front

Vertex

Back

common endpoint of an angle

Front

Acute angle

Back