Question

the number of edges of a solid shape if it has 20 faces and36 vertices

Answer 1

Use the Euler formula.

Which is, F + V = E + 2

Where, F is the number of faces, V is the number of vertices and E is the number of edges.

According to the question:

F = 20

V = 36

Hence, 20+36=E+2

=>56-2=E => E = 54

Number of edges: 54