Mario’s company makes unusually shaped imitation gemstones. One gemstone had 12 faces and 10 vertices. How many edges did the gemstone have?

A. 23 edges
B. 22 edges
C. 25 edges
D. 20 edges****

3 answers

You are correct, it is D

F = 12, V = 10
V - E + F = 2
10 - E + 12 = 2
-E + 22 = 2
-E = -20
E = 20

Thank you

thanks for the help