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Pythagoras Theorem

  1. Nov 23, 2003 #1
    http://www.ies.co.jp/math/java/geo/pitha1/pitha1-2.gif [Broken]

    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?
    Last edited by a moderator: May 1, 2017
  2. jcsd
  3. Nov 23, 2003 #2


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    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
  4. Nov 23, 2003 #3
    I see now, thanks
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