Question

How do you find the total surface area of a cone ? !

Answer 1

Those formulas are tricky.

Answer 2

so do i use all of the formulas ? !

Answer 3

Use the last one. The other ones just show you how they got to the last one. Find the slant height and multiply it by pi and the radius of the cone.

Answer 4

i keep getting a weird answer . . .

Answer 5

What is the problem, specifically?

Answer 6

here is the question

Answer 7

Splendid, looks like the site I chose cannot be trusted. http://0.tqn.com/d/math/1/0/t/L/conerr.jpg

Answer 8

\[\pi*5*9+\pi*5^2\]

Answer 9

or \[70\pi\]

Answer 10

so would it be 219.8 ?

Answer 11

I'd say so.

Answer 12

http://www.wolframalpha.com/input/?i=cone+radius+3+slant+height+9

Answer 13

alrighty ! thank you soo much ! ! (: