Neil had a job helping a jeweler. He had the assignment of counting the faces, vertices, and edges on the emeralds. On the first emerald, Neil counted 9 faces and 16 edges. He quickly realized he didn't have to count the vertices. How many vertices were there?
A. 7 vertices
B.8 vertices
C. 9 vertices
D. 10 vertices

Question

Neil had a job helping a jeweler. He had the assignment of counting the faces, vertices, and edges on the emeralds. On the first emerald, Neil counted 9 faces and 16 edges. He quickly realized he didn't have to count the vertices. How many vertices were there?
A. 7 vertices
B.8 vertices
C. 9 vertices
D. 10 vertices

anonymous · Answer

F + V - E = 2

9 + V - 16 = 2
V = 9