Question

A solid has 14 faces and 12 vertices. How many edges does the solid have?
A.
18 edges
B.
20 edges
C.
22 edges
D.
24 edges

Answer 1

24

Answer 2

formula : number of faces + number of vertices minus the number of edges = 2. It can be written like this : F + V - E = 2
lets plug in our numbers...
14 + 12 - E = 2
26 - E = 2
26 - 2 = E
24 = E
And that is how you do that :)

Answer 3

thanks! I forgot about tht method.