Question

Please help me with this.... Been stuck for days

Answer 1

eulers formula? there are many....

Answer 2

F+V-E = 2

Answer 3

It is the F + V = E + 2 one

Answer 4

and if the solid... polyhedra has an octagonal base... and 8 triangles its an octagonal pyramid...

so will have 16 edges and 9 faces

Answer 5

See Eulers formula is
2D -1D+0D=1
ie #faces -#edges +#vertices=1

Answer 6

ok so i replace the numbers with mine?

Answer 7

like..... 9 - E + V = 1?

Answer 8

well 9 faces, 16 edges

using F + V = E + 2

9 + V = 16 + 2

so

9 + V = 18

solve for V

Answer 9

18 - 9 = 9

So V= 9?

Answer 10

thats it

Answer 11

Thanks sooooo much!

Answer 12

@campbell_st does euler formula differ for 2 dimensional and 3 dimensional cases ??

Answer 13

well in 2 dimensions you don't have faces... and the number of vertices is equal to the number of sides...

Answer 14

ya ya i m sorry in 2 D we have
# loops - #edes +# nodes =1