Question

can you please solve it
urgently
please correct ​

Answer 1

Answer:

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Step-by-step explanation:

EULER'S FORMULA: F + V = E + 2

1. F= a , V=6, E= 12

a+6 = 12+2 ;

a+6 =14

a = 14-6

=8

2. F=5, V= b, E= 9

5+b= 9+2

5+b=11

b= 11-5

=6

3.F=20, V=12,E=c

20+12=c+2

32=c+2

c= 32-2

=30

4. .F=6, V=d,E=12

6+d=12+2

6+d= 14

d=14-6

=8