Square circles

Calculate the length of the described and inscribed circle to the square ABCD with a side of 5cm.

Correct result:

x =  15.708 cm
y =  22.2144 cm

Solution:

a=5 cm r1=a/2=5/2=52=2.5 cm r2=r1⋅ 2=2.5⋅ 2≐3.5355 cm x=2π⋅ r1=2⋅ 3.1416⋅ 2.5=15.708 cm
y=2π⋅ r2=2⋅ 3.1416⋅ 3.5355=22.2144 cm

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