Radius

Find the radius of the circle with area S = 200 cm².

Result

r =  7.979 cm

Solution:

S=200 cm2 S=πr2  r=S/π=200/3.1416≐7.9788=7.979  cm S = 200 \ cm^2 \ \\ S = \pi r^2 \ \\ \ \\ r = \sqrt{ S/\pi } = \sqrt{ 200/3.1416 } \doteq 7.9788 = 7.979 \ \text { cm }

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