three year old what?
girl hit her head and now has a bump and a bruse
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Head circumference of 3 year old?
The circumference of a circle is 2*pi*r. With r = 3, the circumference is 6 pi.
The circumference of a cirlce that has a diameter of 3 inches would be about 9.42 inches
circumference = 2*pi*11 = 69.115 inches to 3 dp
Circumference = pi*11.25 = 36.12831552 or 36.128 units of measurement to 3 d.p.