Radius: 110/2*pi = 17.51 rounded to two decimal places
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double the radius or multiply by 2 the radius
Use the formula for the area of a circle (area = pi x radius squared), replace what you know (in this case the area), and replace - in this case - for the radius.
It is: 110/360*pi*12*12 = 44*pi square units
the radius of a circle is r
The radius of a circle is half the circle's diameter