Question

using Euler formula find the number of face if vertex=10and edge =15​

Answer 1

Answer:

Using Euler's formula

V+F=E+2

E=15

V=10

∴10+F=15+2

∴F=17−10

∴F=7

Step-by-step explanation:

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Answer 2

Answer:

by eulers formula  F + V − E = 2

where F = no of Faces

           V = vertices

and     E = edges

here vertex = 10

and  edges = 15

therefore F + 10 - 15 = 2

                       F  -  5   = 2

                           F      = 2 + 5

                                F  =  7

hence number of faces is 7.