The Incircle and the Altitudes of a Triangle

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Let ABC be a triangle, AA', BB', and CC' be the altitudes, and the inradius. Then

Contributed by: Jay Warendorff (March 2011)
Open content licensed under CC BY-NC-SA

Snapshots

See Theorem 136 in N. Altshiller-Court, College Geometry, Mineola, NY: Dover, 2007 p. 79.


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