Question

I Need help solving this area problem.
@mathstudent55
@ganeshie8

Answer 1

First find the circumference of the circle base

Answer 2

Now, draw a triangle, the base of the triangle is the same length of the circumference. The other 2 legs are a length of 20

Answer 3

Then use Heron's formula to find the area of a triangle.

Answer 4

\(\large LA_{cone} = \pi r L\)

Answer 5

so it would be 2*pi*9 = 56.54
C= 56.548 aprx. 54.55
?

Answer 6

The lateral surface area of a cone is the product of the radius of the base, pi, and the slant height.
In the figure above, L is the slant height.

Answer 7

Where are you getting the 2 from?

Answer 8

Circumference formula?

Answer 9

All you need is this:
pi * r * L

Answer 10

565.486 or .49

Answer 11

I'd say 565.5

Answer 12

Therefore, it's D. 565. 7 ...
Idk where their .7 came from?

Answer 13

Me neither, but that is the closest answer by far.

Answer 14

Thank you :)

Answer 15

wlcm