STEP 1: Use the ruler to draw a straight horizontal line, draw a diagonal line from the end of the horizontal line... Image caption, ...and draw another diagonal line to join the points and mark the ...
Named for Plato, who theorized that the classical elements were made of these regular polyhedrons, three of the Platonic solids are composed of equilateral triangles: the tetrahedron, octahedron, and ...
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