Question

Using a 21-sided polygon as a base, complete the following table: POLYHEDRON NUMBER OF FACES

Answer 1

For the case of a Prism we can do this:

F= n+ 2= 21+2= 23

E= 63

V = E -F +2= 63-23 +2= 42

For the pyramid :

E= 21*2 = 42

F = E-V+2 = 42-22 +2= 22

V = 22