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3 years ago

The area of a circle is 201cm² . what is the diameter ?

Mathematics

2 answers:

lisabon 2012 [21]3 years ago

8 0

The answer is 16 cm approx.

Diameter= 2 $\sqrt{a/pi}$

=>2 $\sqrt{201 / 22/7}$

=>2 $\sqrt{201*7/22}$

=>15.997.......

=> 16 approx

Hope this helps you!!

seraphim [82]3 years ago

5 0

Answer:

The diameter of the circle is 16

Step-by-step explanation:

$\pi = 3.14$

Area = $\pi r^{2}$ you will have to use this formula to find the radius

$\pi r^{2} = 201$ = $3.14r^{2}=201$ (divide 3.14 into both sides)

$\frac{3.14r^2}{3.14} = \frac{201}{3.14}$ cross out 3.14 leaves you with $r^2$ and divide 201/3.14= 64.01

$r^2 = 64.01\\r = \sqrt{64.01}\\r = 8$ square root 64.01 which equals 8

Diameter = $2r$ 2(8) = 16

To check answer use Area formula $\pi (8)^{2}$ = 201. 0619298

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