What is the formula for surface area of a cone?

I need to find surface area for a cone… and I need the formula.

Thanks!
(Please hurry and answer, I need my good sleep and need to hit the hay soon!)

π*r^2 + π*r*sqrt(r^2 + h^2)

r is the radius at the opening and h is the cone’s vertical height (as opposed to being the slant height).

This entry was posted on Sunday, January 17th, 2010 at 4:24 am and is filed under area formula. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

2 Responses to “What is the formula for surface area of a cone?”

kisikililake on January 17th, 2010 at 9:29 am

check this out.
References :
http://z.about.com/d/math/1/0/t/L/conerr.jpg
Gerry on January 17th, 2010 at 10:14 am

π*r^2 + π*r*sqrt(r^2 + h^2)

r is the radius at the opening and h is the cone’s vertical height (as opposed to being the slant height).
References :

Area List