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).