To find the surface area, use this Cone Area Formula:
(Pi x r2) + (Pi x r x S)
Pi = 3.1416
r = radius of the base
S = the slant length from the base to the tip of the cone
(the slant length is calculated from the height and the radius by
using the pythagorean theorem)
Example: If a cone has a height of 12 inches and a base radius of
4 inches, what is the surface area?
Calculate the slant length = 122 + 42 = S2
S = 12.6491
Cone Area = (3.1416 x 16) + (3.1416 x 4 x 12.6491)
Cone Area = 209.2194 square inches
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