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Re: feet of altitudes and angles
Posted:
Nov 27, 1997 6:23 AM


Dear Annie It's easy to prove using properties of the cyclic quads formed by the altitudes. Regards Michael
On Wed, 26 Nov 1997, Annie Fetter wrote:
> 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. > > Annie > > >



