Question

I always medal.
Find the surface area of a cone.
(screenshot of the cone here)
http://prntscr.com/a70agj

Answer 1

468.23 or 468

Answer 2

surface area = pi r^2 + pi r l

where r = radius of the base and l = slant height

Answer 3

Um...ok. Can I have an explanation ?

Answer 4

r = radius of the base . radius = 1/2 * diameter which you are given ( = 8)
l = slant height of the cone = 7

Just plug these values in to the formula
use 3.14 for pi

Answer 5

.5*4*7?

Answer 6

no
plug the values into pi r^2 + pi r l

Answer 7

r = 1/2 * 8 = 4

Answer 8

just replace pi by 3.14 , r by 4 and l by 7 and work it out. Use your caclulator.

Answer 9

ok.....

Answer 10

The pi*r^2 portion is what gives you the area of the circular bottom panel.