Question

9. A polygon has 30 sides and 12 faces. Find
the number of vertices of the polygan.​

Answer 1

$\huge\underline\mathfrak\red{Answer}$

==>>Euler's polyhedron formula, V−E+F=2

V = number of vertices

E = number of edges

F = number of faces

So, 12−30+F=2

F−18=2

F=18+2

F=20

Number of faces = 20.