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The Area of a Triangle inside the Incircle


	Let ABC be a triangle and let be the radius of its incircle with center I. Let D and E be the feet of the perpendiculars from I onto AB and AC, respectively. Then .


	Contributed by: Jay Warendorff After work by: Antonio Gutierrez

The statement of the theorem is in Problem 80. Triangle Area, Incircle, Inradius, Sides.

Incircle (Wolfram MathWorld)

"The Area of a Triangle inside the Incircle" from The Wolfram Demonstrations Project
http://demonstrations.wolfram.com/TheAreaOfATriangleInsideTheIncircle/

Contributed by: Jay Warendorff

After work by: Antonio Gutierrez

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