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1.570796326794896619 and so on
Half a pie or a slice of a pie that is one half of the whole
pi= 3.14159265358979323846264338327...
Anything divided by itself is 1 because it only divides once.
So 2 pi / 2 pi = 1
The radius of a circle whose circumference is 36 pi (113.1) is: 18 (circumference divided by Pi divided by 2 = radius)
pi divided by 2
Circumference = Diameter multiplied by Pi Diameter = Circumference divided by pi Radius = Diameter divided by 2.
It is: pi*4^2 divided by 2 = 8/pi which is about 25 square cm
0.75