2.2 作等边三角形

Author:郑凯耀, Tim Brzezinski

The applet below dynamically illustrates how an equilateral triangle can be constructed via compass and straightedge. Why is this method of construction valid?

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Folding door
Proving Triangles Similar: Multistep Transformations
Position Vector and Derivative Vector
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Actividad #2 g)
Proof Pythagorean Theorem
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