Question

Use Euler's Formula to find the missing number.
Vertices: 13
Edges: 26
Faces: ?

14
15
16
17

Answer 1

Euler Formula
for faces, vertices and edges
F+V−E=2

Answer 2

I think it would be 15

Answer 3

i think your right

Answer 4

Thank you!

Answer 5

Euler's formula states:

r = m - v + 2, where r = faces, v = vertices, and m = edges

r = 26 - 13 + 2
r = 15

Answer 6

Thank you annas!

Answer 7

Welcome :)

Answer 8

sure

Answer 9

Find the surface area of the cylinder to the nearest whole number. The figure is not drawn to scale.

905 in^2
1,282 in^2
2,187^2
7,691^2

Answer 10

@annas can do this one i dont remember these haha

Answer 11

surface area of cylinder is: 2 π r^2 + 2 π r h
(2 * 3.1415 * (12)^2) + (2 * 3.1415 * 12 * 17)

Answer 12

My answer wasn't even on there haha

Answer 13

A = 1281.7 in^2 = 1282 in^2

Answer 14

Thank you!

Answer 15

Welcome ^.^

Answer 16

Mind helping me with one or two more?

Answer 17

I can try :)

Answer 18

Find the surface area of the regular pyramid shown to the nearest whole number. The figure is not drawn to scale.

351m^2
415m^2
542m^2
790m^2

Answer 19

hmm not very sure about it's formula :/ sowwy

Answer 20

It's okay :) Thank you for helping me with the other one :)

Answer 21

Welcome again :) & sowwy again for not able to help on this one :/