Question

A circle has an area of 324╥ cm². What is the radius?
A) 18 c,
B) 36╥ cm
C) 18╥ cm
D) 36 cm
(I think It's D) I got d=²r ...
d = (2)18 ..
BUT I'M NO SURE IF THAT

Answer 1

Then:

\(\Large \color{Black}{\Rightarrow \pi r^2 = 324 }\)

Solve.

Answer 2

Actually:

\(\Large \color{Black}{\Rightarrow \pi r^2 = 324\pi}\)

Answer 3

I got 18 x 18 = 324

Answer 4

area = (pi) r^2
324/(pi) = r^2

\[\sqrt{\frac{324}{\pi}} = r\]

Answer 5

so then I did 2(18) = 36

Answer 6

\(\Large \color{Black}{\Rightarrow r^2 = 324 }\)

\(\Large \color{Black}{\Rightarrow r = \sqrt{324} = 18 }\)

Diameter is 2(18) = 36

Answer 7

And the radius is 18

Answer 8

So the diameter is 36? Radius is 18?

Answer 9

ooooh, area is 324xpi though I was going mad. That's a strange pi in the question !

Answer 10

aahh I only help ALT + 210 to get that pi

Answer 11

the aqn editor has also gone down hill here used to work ok!