Question

Suppose the area of a circle is 16pi. What is its diameter?

Answer 1

Okay, real quick... what's the formula for the area of a circle?

Answer 2

Area=pi*radius^2

Answer 3

\[\Large \pi r ^2\]
and this is equal to \(\large16\pi\), which IS the area of the given circle.

Given that, can you solve for the radius r? ^_^

Answer 4

8

Answer 5

Stuck?
Start with
\[\large 16\pi = \pi r^2\]
And divide both sides by \(\pi\)

Answer 6

Thanks. :D

Answer 7

No problem. :)

Answer 8

yea and the answers 8