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

You are watching: Ab and ba name the same ray

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

The adhering to are some examples of rays:

1. A laser pointer creates a ray of light.

2. The number heat showing totality numbers is really not a line, yet a ray. It starts at the endpoint, 0, and also extends infinitely v 1 because there is no greatest entirety number.

3. In coordinate geometry, an inequality have the right to be represented as a beam on a number line.

The inequality x≥-1 have the right to be stood for by the ray above, who endpoint is in ~ -1 on the real number line.

## Naming rays

A ray has a directional ingredient so be cautious how you name it. Ray abdominal muscle is not the very same as beam BA.

A ray with 3 labeled points deserve to be named in different ways, as shown below. Just make sure to encompass the endpoint.

## Angles and rays

An angle is created when two rays re-publishing a usual endpoint.

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

### Did friend know?

A ray of sunshine starts at the sun (the endpoint) and also travels through an are in one direction. A ray from the sun can be offered as a version for thinking about a ray in geometry.

See more: Who Was The French Philosopher Called The “Father Of Romanticism”?

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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