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

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