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PiRsq
Nov23-03, 04:29 PM
http://www.ies.co.jp/math/java/geo/pitha1/pitha1-2.gif

This is one of the many pythagorean proofs and I dont understand why A1=A2 and A4=A3? Can someone explain this to me please?

NateTG
Nov23-03, 06:06 PM
ABC, HBA, and HAC are all similar triangles.

That means that the ratio of the sides are the same/
so AB/BC=BH/AB
so AB*AB=BH*BC
so A1=A2

There is a simliar argument for B1 and B2

PiRsq
Nov23-03, 07:41 PM
I see now, thanks