Radius = 7.334464586 units
Check: pi*7.3344645862 = 169 square units
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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
If x^2 plus y^2 = 169 then the center of the circle is at (0, 0) and its radius is the square root of 169 which is 13
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