A ray is a component of a line that has actually one endpoint and extends infinitely in one direction indigenous the endpoint.

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In the figure above, beam AB, composed symbolically as AB, contains all of the points on line ab from A in the direction of B.

The following are some instances of rays:

1. A laser reminder creates a beam of light.

2. The number line showing totality numbers is really not a line, yet a ray. It starts at the endpoint, 0, and also extends infinitely through 1 due to the fact that there is no greatest entirety number.

3. In name: coordinates geometry, one inequality can be represented as a beam on a number line.

The inequality x≥-1 deserve to be stood for by the ray above, whose endpoint is at -1 top top the real number line.

## Naming rays

A ray has actually a directional component so be careful how you name it. Ray ab is no the very same as ray BA.

A ray through 3 labeled points deserve to be called in different ways, as displayed below. Simply make certain to incorporate the endpoint.

## Angles and rays

An angle is formed when two rays re-superstructure a usual endpoint.

Rays abdominal and BC re-publishing endpoint B and form the political parties of ∠ABC.

### Did you know?

A ray of sunshine begins at the sun (the endpoint) and travels through space in one direction. A ray from the sun deserve to be offered as a model for thinking about a ray in geometry.

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See likewise line, line segment.

Line
1D
Bisect
Chord
Collinear
Coplanar
Diagonal
Edge
Endpoint
Horizontal line
Intersect
Intersecting lines
Line of symmetry
Line segment
Parallel lines
Perpendicular
Perpendicular bisector
Perpendicular lines
Ray
Secant
Skew lines
Vertex
Vertical line