Use the following formula valid fo every polyhedron.
v-e+f=2
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Search for Euler characteristic, or Euler-Poicare characteristic for more depth about this formula </span>
v= number of vertices
e=number of edges
f=number of faces
<span>You get v=13
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The value of x is 2. because you rule out y so it is 6times2is 12+3. that is 15
Answer:
21=12+9
Step-by-step explanation:
