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Polyhedra are named according to the number of faces that they have. An icosahedron is a 3-dimensional shape with 20 faces. It could be in the form of a pyramid with a 19-sided polygon as base. In that case, it has 20 vertices. Or it could be in the form of a prism with 18-sided polygons as base and in that case it has 36 vertices. There are several million different configurations, and the number of vertices varies.


The regular icosahedron is a Platonic solid with faces that are equilateral triangles. That has 12 vertices.


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There is no simple answer to this question.

An icosahedron is a 3-dimensional shape with 20 faces. It could be in the form of a pyramid with a 19-sided polygon as base. In that case, it has 20 vertices. Or it could be in the form of a prism with 18-sided polygons as base and in that case it has 36 vertices. There are several million different configurations, and the number of vertices varies.


The regular icosahedron is a Platonic solid with faces that are equilateral triangles. That has 12 vertices.



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9y ago
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An icosahedron has 20 faces, 30 edges, and 12 vertices. All the faces are triangles.

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9y ago
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Q: How many vertices does an icosahedron have?
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