# math

a polyhedron has 36 edges and 21 faces, how many vertices does it have?
thank you

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1. You can use Euler's polyhedral formula:
V+F-E = 2
V=number of vertices
F=number of faces
E=number of edges

Substitute
E=36 and F=21 into the polyhedral formula and solve for V.

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2. 79

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