Line Defined By Three Points (Ray)

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The ray tool is mostly used during constructions.  You would use it in situations where the line you are drawing is determined by a point that is NOT one of the end points.


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When drawing in the angle bisector, you are likely to want to extend the line past the intersection which is a little difficult with the standard line tools.  This is a great time to use the ray tool.


The ray tool is easier to use than to describe.  To begin with, you draw a line to the intersection.  This defines the angle of the line.


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Now that you have defined the angle, if you move the mouse you should notice that the line changes length.  It is always on the same angle - just the length has changed.


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The line does not even need to be in the same direction.


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Click again and your ray will appear.


If we select the ray you will see three selection squares.


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