Points, Lines, and Rays

A line is straight and extends in both directions forever.

A point is an exact location in space.

Parallel lines are lines that never intersect and are always the same distance apart.

Perpendicular lines are lines that intersect at a right angle (90 degrees).

A ray is a part of a line that starts at a point and extends infinitely in one direction.

A line segment is a part of a line that has two endpoints.

A ray is named using its starting point and another point on the ray, for example, Ray AB.

Intersecting lines are lines that cross each other at one point.

A line extends infinitely in both directions, while a line segment has two endpoints.

The symbol for a line is usually represented by two arrowheads on both ends.