The surface area of a cone is given by the formula S = ar2 + arl where / is called the slant height. We can use the Pythagorean Theorem to find the slant height (see above figure). Using the formula, find the slant height and surface area of the following cone. (figure is not to scale, use 3.14 for #) 11 ydi - L - 8 yd Slant Height = yd Surface Area = yd2 Get Help: eBook Points possible: 1