How to construct an altitude to a triangle
You are given a triangle. 
First draw a circle using A 
Then draw a second circle 
1. Time to practice! Draw an altitude to each triangle from the top vertex. Notice the second
triangle is
obtuse, so the altitude will be outside of the triangle.

2. Draw all three altitudes to this triangle. Can you notice something special about
the three altitudes you draw?
This lesson is taken from Maria Miller's book Math Mammoth Geometry 3, and posted at www.HomeschoolMath.net with permission from the author. Copyright © Maria Miller.
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