Area of a circle = pi x r2
pi = 3.14159 (to five decimal places)
No units are given for radius, which is a must. I am going to use meter.
A = 3.14159 x (0.6m)2 = 1m2 *The numerical answer is limited to one significant figure because of the radius, which only has one significant figure, and when multiplying and dividing, the answer is limited to the fewest significant figures in the measurements used in the calculation.
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The area of a circle with a radius of 14.4 is 651.4
Area of a circle = pi*radius squared
The area of a circle of radius 21 is 1386
A circle with a radius of 135 units has an area of 57,255.53 square units.
If the area of a circle is 40.7 the radius is: about 3.6 (3.599)