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harkovskaia [24]
3 years ago
11

I NEED HELP ASAP

Mathematics
1 answer:
Allushta [10]3 years ago
7 0
Euler's formula is given by:
 C + V = A + 2
 Where,
 C: number of faces
 V: number of vertices
 A: number of edges.
 Clearing A we have:
 A = C + V-2
 Substituting values:
 A = 21 + 14-2
 A = 33
 Answer:
 
the missing number is:
 
C.33
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