Mathematics, 03.07.2019 13:00 babyduckies37

Using euler's formula, find the number of edges in a polyhedron with 7 faces: 2 pentagons and 5 rectangles. can someone explain this. i am lost.

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Using euler's formula, find the number of edges in a polyhedron with 7 faces: 2 pentagons and 5 rec...

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