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Icosahedron addressed (Posted on 2016-05-11) Difficulty: 3 of 5
A regular icosahedron is one of the five Platonic solids.
It has 20 faces, 30 edges and (how many?) vertices.

Derive the formulas for its area and volume.

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
Vertices, verticesJayDeeKay2016-05-11 17:38:05
Some ThoughtsThe area and a start toward the volumeCharlie2016-05-11 14:41:18
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