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Cathar · 10-15-2002, 09:02 AM

r = radius = half of the circle diameter (distance across the circle at the widest point

area = 3.14159265 * r * r

eg. if your circle is 9mm across

the area is 3.14149265 * 4.5 * 4.5 ~= 63.6 mm^2

10-15-2002, 09:02 AM	#2
Cathar Thermophile Join Date: Sep 2002 Location: Melbourne, Australia Posts: 2,538	r = radius = half of the circle diameter (distance across the circle at the widest point area = 3.14159265 * r * r eg. if your circle is 9mm across the area is 3.14149265 * 4.5 * 4.5 ~= 63.6 mm^2