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Geometric Model by A. Harry Wheeler, Equilateral Triangle with Inscribed Rectangle or Parallelogram with an Inscribed Square, Plane Dissection

Click to open image viewer. Hinged Plane Dissection, Three quadrilaterals and one triangle which can be arranged as a triangle or a quadrilateral (front side). CC0 Usage Conditions ApplyClick for more ...
insider.si.edu

Geometric Model by A. Harry Wheeler, Equilateral Triangle with Inscribed Rectangle or Parallelogram with an Inscribed Square, Plane Dissection

The pieces form an equilateral triangle with an inscribed rectangle which transforms into a parallelogram with an inscribed square. This is a special case of Wheeler's model 4K (trapezoid into a ...