terms math ch. 1-5

point

has no dimension a dot represents a point

line

has one dimension it is represented by a line with two arrowheads. but it extends without end.

plane

has 2 dimensions it is represented by a shape that looks like a floor a wall but it extends without end

line seg/segment

a part of a line that consists of 2 endpoints and all points on the line between the endpoints

ray

a part of a line that consists of an endpoint and all points on the same line on one side of the endpoint

opposite ray

two rays that have the same endpoint and form a line

postulate/axiom

a rule that is accepted without proof