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plane

An infinite number of points and lines on a flat surface that extends without end, and has no thickness

angle

Formed by two raised with the same endpoint

Line

Infinite number of points on a straight path that extends into opposite directions with no end, and has no thickness

ray

The part of a line that consist of one endpoint and all the points of the line on one side of the endpoint

Point

Is a location and has no size

segement

Part of a line that consists of two points, called endpoints, and all points between them

colinear points

Points that lie on the same line

opposite rays

Rays with the same endpoint that lie on the same line

postulate

Statement that we except without proof