help with surface area for a cone?

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i no tha the radius of the cone is 9. how and what is the total surface area of the cone? geometry

2007-12-10 10:26:14 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

it doesnt give the height, only that the radius of the base is 9. thats all the info i get

2007-12-10 10:35:22 · update #1

Ice cream?

2007-12-10 10:29:34 · answer #1 · answered by Anonymous · 0⤊ 0⤋

What is the length of the cone?

2007-12-10 10:29:20 · answer #2 · answered by McDudette 3 · 0⤊ 0⤋

formula for surface area of a right-circular cone:

S = pi * R * (R + h)

in your case R = 9 so...

S = 9 * pi * (9 + h)

.

2007-12-10 10:39:52 · answer #3 · answered by tlbs101 7 · 0⤊ 0⤋