Question

Verify Euler's formula for these solids​

Answer 1

1) In this figure

F= 7, V= 10,E= 15

F+V=7+10=17 and E+ 2=15+2=17

F+V=E+2

Hence,Euler's formula is verified.

2) In this figure

F=9, V=9, E=16

F+V=9+9=18 and E+2=16+2=18

F+V=E+2

Hence, Euler's formula is verified.

Answer 2

II)

face = 9

vertices =9

Edges =16

V+F-E = 2

9+9-16=2