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Gerwien's Simultaneous Dissection of Three Triangles of Same Area

dissection

original figure

figure from Frederickson's book

move A

1.2

red

magenta

yellow

blue

With

|BC|=|CD|=|DE|

, the triangles

ABC

ACD

and

ADE

are each dissected into translations or translations after a half-turn of the same four parts.

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