Use the Euler formula to find the missing number of faces if vertices:15, Edges: 24.

We will use Euler's formula to find the missing number of faces.

Answer: For 15 vertices and 24 edges, the number of faces is equal to 11.

Let's see how Euler's formula is used to find the missing number of faces.

Explanation:

Euler formula states that if in any regular solid, number of faces are represented by F, vertices are represented by V, and E represents edges then, the relation between F, V, and E is given by, 

F + V = E + 2 ------------- (1)

We have, V = 15 and E = 24 (given)

Now, substituting the values in above equation (1) we get,

F + 15 = 24 + 2

⇒ F = 26 - 15

⇒ F = 11 

Therefore, the number of faces is equal to 11.