Dissecting an Equilateral Triangle into Three Smaller Ones

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The Demonstration shows Plato's three-triangles-to-one dissection.
Contributed by: Izidor Hafner (August 2013)
Open content licensed under CC BY-NC-SA
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Reference
[1] G. N. Frederickson, Dissections: Plane & Fancy, New York: Cambridge University Press, 2003 p. 43.
Permanent Citation
"Dissecting an Equilateral Triangle into Three Smaller Ones"
http://demonstrations.wolfram.com/DissectingAnEquilateralTriangleIntoThreeSmallerOnes/
Wolfram Demonstrations Project
Published: August 9 2013