Points D and G move with speeds that are smaller than the speed of A by a factor (sqrt 3)/3. The direction of the velocity of D differs by a constant angle 30o from the direction of the velocity of A.

Move A and observe the velocities of D and G.

Drag A.

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Napoleon's triangles
Figure 14

Alfinio Flores
ASU

This is a prototype of JavaSketchpad, a World-Wide-Web component of The Geometer's Sketchpad. Copyright ©1990-1997 by Key Curriculum Press, Inc. All rights reserved. Portions of this work are being funded by the National Science Foundation (awards DMI 9561674 & 9623018).