Question

As circle has a radius of 3 cm. what happens to the area if the radius is doubled to 6 cm?

A.it is doubled

B. it is tripled

C.it is quadrupled

D. it says the same

Answer 1

a becaouse in a circle if you double one they all double

Answer 2

k i'm going to see some other answers about this question k

Answer 3

okay =) that will be good

Answer 4

to see what other people thing

Answer 5

No. Area is proportional to the square of the radius.

Answer 6

So what dows that mean @douglaswinslowcooper ?

Answer 7

i ment does

Answer 8

A2/A1 = (r2/r1)^2 A and r are the areas and radii

Answer 9

Is it because there the variables?? @douglaswinslowcooper

Answer 10

\[A = \pi r ^{2}\]
\[Area1 = \pi \times 3^{2} = 9 \pi\]\[Area2 = \pi \times 6^{2} = 36 \pi\]
\[\frac{ area2 }{ area1 } = \frac{ 36 pi }{ 9 pi } = 4\]
Conclusion: the area is four times grater in this case.

Answer 11

Yes
Area = pi (radius)^2

New area = pi (2 old radius)^2 = pi 4 (old radius )^2 = 4 old area

When something is squared, doubling it quadruples the square.

Answer 12

So Im guessing @Lyrae and @douglaswinslowcooper That its C.

Answer 13

Yes. Not a guess.

Answer 14

Yes.

Answer 15

Thankyou for taking me step by step in understanding it...and thanks for your time:))) have a nice day:))