Question

Find the surface area of the cone to the nearest whole unit.

Answer 1

Do you know the formula to find the SA (Surface Area) of a cone?

Answer 2

umm.. SA = pi-r^2 + pi-rl

Answer 3

(technically theres no dash between pi and r but just so it's not confusing)

Answer 4

Right! pi = 3.14 so we can plug that in

SA = 3.14r^2 + 3.14rl

Answer 5

R = Radius
L = Slant Height

Can you tell me the radius (half of diameter) and slant height of this cone is?

Answer 6

4 and 7?

Answer 7

Right! So R = 4 and L = 7

Plug it is

SA = 3.14*4^2 + 3,14*4*7

Answer 8

50.24 + 87.92 = 138.16 so 138. Thank you so much!