A = 530.9
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radius of a circle = 13 metersArea of a circle =π * radius2radius = square root of Area/π=√531/π=√ 531/3.1416=√ 169= 13
Using 3.14 as Pi the area of circle is: 530.66
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