Where do soccer balls come from?

Geometry Level 2

The dodecahedron has 12 pentagonal faces. Therefore it has 12×52=30\frac{12 \times 5}{2} = 30 edges.

The icosahedron has 20 equilateral triangular faces. Therefore it has 20×32=30\frac{20 \times 3}{2} = 30 edges.

How many edges does a truncated icosahedron have?

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