http://www.ck12.org Chapter 1. Basics of Geometry
- Move the pointer to the arc intersection with the horizontal side. Make a second arc mark on the interior of
the angle. Repeat on the other side. Make sure they intersect. - Connect the arc intersections from #3 with the vertex of the angle.
To see an animation of this construction, view http://www.mathsisfun.com/geometry/construct-anglebisect.html.
Example A
How many angles are in the picture below? Label each one two different ways.
There are three angles with vertexU. It might be easier to see them all if we separate them out.
So, the three angles can be labeled,^6 XUYor^6 Y U X,^6 Y U Zor^6 ZUY, and^6 XU Zor^6 ZU X.