Introduction: How to Make a Pyramid From Cardboard and a Perfect Circle
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About: You may recognize Dan and Denise Rojas from their appearances in various made for tv movies and national commercials. As the hosts of Green Power Science, they share Fresnel lens and alternative energy ideas, …
Published on Apr 15, 2012 by GREENPOWERSCIENCE
Solar Collector DIY Tetrahedron.
A tetrahedron is a polyhedron composed of four triangular faces, three of which meet at each vertex.
