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12 = E of a R O

Category:Letter-Equations
Submitted By:shenqiang
Fun:** (1.8)
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12 = E of a R O

Answer:

12 = edges of a regular octahedron.

It is called an octahedron because it has 8 faces. Although there are more than one type of octahedra, the most symmetric one, the regular octahedron, has 12 edges.

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