# point

A point is a dimensionless geometric object having no properties other than location or place; also the intersection of two straight lines or of a straight line and a plane. More generally, a point is an element in a geometrically described set.

## Properties of points

• Two distinct points determine a straight line.

• Two straight lines, which lie in a plane and are not parallel, intersect
in a point (point of intersection).

• If three distinct points lie on a straight line we can say of just
one of these points that it lies between the other two. (Ordering of
points on a straight line.)

• Three points of space which do not lie on a straight line determine
a single plane.