Mathematics: 12 If the ratio of the radii of two circles is 2:7, what is the ratio of area of the smaller circle to the area of the larger circle? F. 2:7 G. 4:49 H. 8:343 J. 12:17 K. It cannot be determined base on the information given.

12 If the ratio of the radii of two circles is 2:7,

Imelda593

03.05.2021

4:49

Step-by-step explanation:

Here, we want to get the ratio of the smaller to the larger circle

Mathematically, the area of a circle is;

π * r^2

So for the two circles, the product π will be same

what will

be different is the square of the radius

for the first circle ,we have the radius square as 2^2 = 4

For the second, we have the radius square as 7^2 = 49

so, the ratio of the two to each other is;

4:49

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glowbaby123

25.07.2022

r=8~cm

Step-by-step explanation:

Greetings!

I'm~Isabelle~Williams~and~I~will~be~answering~your~question!

To~find~the~radius~of~a~circle~we~have~to~use~the~formula~that~is:

$\boxed{~d=2r~}$

Now,~according~to~the~formula~we~divide~16~by~2:

$r=\frac{16}{2}=8~cm$

Thus,~the~radius~of~the~diameter~is~8~cm.

Hope~my~answer~helps!~Have~an~amazing~day~ahead!

-Isabelle~Williams

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