Question

a polyhedron has 10 faces and 20 edges find the number of vertices​

Answer 1

F+V−E=2, where F represents the number of faces, V represents the number of vertices and E represents the number of edges. We are given that the number of faces is 10, the number of edges are 20 and number of vertices are 15.

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Answer 2

Step-by-step explanation:

by using Euler's formula

faces + vertices - edges=2

let the no of vertices be x

10+x-20=2

10+x=2+20=22

x=22-10=12

no of vertices =12