Smith, David Eugene, 1860-1944 · Boston, New York [etc.] Ginn and Company · leaf 323
This is a form that is found in crystals, and the com-putation of the surface and volume is an interesting LEADING PROPOSITIONS OF BOOK VII 313 exercise. The quartz crystal, an hexagonal pyramid onan hexagonal prism, is found in many parts of thecountry, or is to be seen in the school museum,…
Geometry
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