Which of the following formulas correctly calculates the surface area of a cone? (1 point)
pi*rl + pi * r ^ 2
Ο 2pi*rl + pi * r ^ - 2
pi*rl + 2pi * r ^ 2
2pi*rl + 2pi * r ^ 2
pi*rl + pi * r ^ 2
Ο 2pi*rl + pi * r ^ - 2
pi*rl + 2pi * r ^ 2
2pi*rl + 2pi * r ^ 2