## anonymous 4 years ago A solid candy jawbreaker is cut in half. If its diameter is 4 cm, what is the surface area of a half piece? please show me the steps.

1. Mertsj

$SA=4\pi r^2$

2. Mertsj

Plug 2 into that in place of r. When you get the answer, divide it by 2 since we're talking about half a jawbreaker.

3. anonymous

it is 16 pi. you divide with 2 it becomes8 pi.is it right

4. Mertsj

That's what I got.

5. anonymous

6. Mertsj

We forgot to add the flat surface which is a circle with radius 2

7. anonymous

8. Mertsj

The area of that circle is pi(2)^2 or 4 pi

9. Mertsj

|dw:1328826025121:dw|

10. Mertsj

The 8 pi is the area of the shaded part. The flat part where it was cut in two is part of the surface too.

11. Mertsj

Do you understand?

12. anonymous

what answer did you get it?