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OpenStudy (anonymous):
A polyhedron has 7 faces and 12 edges. What is the number of vertices of the polyhedron? Answer 3 5 7 9
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Directrix (directrix):
Vertices + Faces = Edges + 2 V + 7 = 12 + 2 V = 7
OpenStudy (anonymous):
7
OpenStudy (anonymous):
thanks
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