Question

what is the radius of a circle with an area of 64 sq feet

Answer 1

radius= 1/2 • diameter
area of a circle = pie r^2 or (3.14 • radius^2 so u need the diameter this question needs more info

Answer 2

For this case we have that by definition, the area of a circle is given by:

$A = \pi * r ^ 2$

Where:

r: It is the radius of the circle

How do we have to:

$A = 64 \ ft ^ 2$

So:

$64 = \pi * r ^ 2$

We take$\pi = 3.14$

$r ^ 2 = \frac {64} {3.14}$

We apply square root:

$r = \pm \sqrt {\frac {64} {3.14}}$

We choose the positive value:

$r = 4,515$

If we round we have that the radius is 4.5 feet.

Answer:

4.5 feet