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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 ...
BBC

KS2 Maths: Problem solving with equilateral triangles

VO: Ambrose is an apprentice at the world famous Grecian Pizza Parlour. He's learning all aspects of the profession, and is now able to roll out a perfect circle of dough. This is how professional ...
insider.si.edu

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

The four pieces of this hinged dissection have plastic on both sides and a wooden core. They can be arranged as an equilateral triangle or a rhombus .The pieces on one side have smaller plastic parts ...