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Topic: feet of altitudes and angles
Replies: 5   Last Post: Dec 1, 1997 12:41 AM

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Annie Fetter

Posts: 524
Registered: 12/3/04
feet of altitudes and angles
Posted: Nov 27, 1997 12:52 AM
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My grandmother, who used to be a math teacher, read this problem long ago
and has always wondered about a proof. (She was never 100% sure that it
was really true until I modelled the problem in Sketchpad for her. Now she
is a believer.) I haven't tried to prove it yet, but told her I would
throw it out to the wolves and see what people came up with.

Prove that the angles formed by connecting the feet of the altitudes of a
triangle are themselves bisected by the altitudes.


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