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ICSE-VIII-Mathematics

19: Representing 3-D in 2-D Class 8 Maths

with Solutions -
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  • #2
    If a polyhedron has 10 vertices and 7 faces, find the number of edges in it.
    Ans : Vertices = 10
    Faces = 7
    Using Eulers formula,
    F + V - E = 2
    ⇒ 7 + 10 - E = 2
    ⇒ -E = -15
    ⇒ E = 15