Ray (Coordinate Geometry)
which starts at a
and goes off in a particular direction to infinity,
possibly through a second point.
Adjust the ray below by dragging an orange dot and see how the ray
AB behaves. You can also drag the origin point at (0,0).
A ray is a
that starts at a given
and goes off for ever in some direction.
It may pass through another point as it does so.
This is the same as the definition of a Ray in ordinary plane geometry,
the only difference being that we know the
of the points involved. The naming conventions are also the same.
Things to try
- In the above diagram, press reset. The ray AB has an endpoint A at (53,7) and
passes through point B at (53,20) on its way to infinity.
- Drag A, B or the origin point and construct various other rays to get a feel for the concept.
See also the definition of a Ray in plane geometry.
In the interest of clarity in the applet above, the coordinates are rounded off to integers and the lengths rounded to one decimal place.
This can cause calculatioons to be slightly off.
For more see
Other Coordinate Geometry entries
(C) 2009 Copyright Math Open Reference. All rights reserved
Math Open Reference now has a Common Core alignment.
See which resources are available on this site for each element of the Common Core standards.
Check it out