1440? I'm not that sure, sorry.
The gemstone has 20 edges.
Step-by-step explanation: We are given that Mario’s com pany makes unusually shaped imitation gemstones. One gemstone has 10 faces and 12 vertices.
We are to find the number of edges that the gemstone have.
Euler's formula : If F, E and V represents the number of faces, number of edges and number of vertices respectively, then the following is true :
For the given gemstone, we have
F = 10, V = 12 and E = ?
From equation (i), we get
Thus, the gemstone has 20 edges.
21 edges does the gemstone have
By Leonard Euler's Polyhedral Formula:
v is the vertices
f is the faces
e is the edges.
As per the statement:
Mario’s company makes unusually shaped imitation gemstones.
One gemstone has 12 faces and 11 vertices.
⇒f = 12 and v = 11
Substitute these in  we have;
Therefore, 21 edges does the gemstone have
The answer is B. 10 vertices because it all depends on the edges. You have to subtract the edges by faces/vertices to get your faces/vertices so 20-12 is 10 so you are correct
The answer would be 20 edges.
mario's company makes unusually shaped imitation gemstones. one gemstone had 12 faces a...