JSP-Applet: Quadrilateral Coil

Key Curriculum Press

Sketchpad Notes

In this sketch, congruent quadrilaterals are joined edge to edge. You can vary the shape of the quadrilaterals by dragging the vertices at the yellow quadrilateral.

What series of quadrilaterals create a straight line?
What must be true of the quadrilaterals in order for a "coil" of them to close perfectly upon itself?

This is a prototype of JavaSketchpad, a World-Wide-Web component of The Geometer's Sketchpad. Copyright & copy ; 1990-1998 by Key Curriculum Press, Inc. All rights reserved. Portions of this work were funded by the National Science Foundation (awards DMI 9561674 & 9623018).

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JSP-Applet: Quadrilateral Coil

Key Curriculum Press

Sketchpad Notes