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A circle with a radius of 9.6 millimeters has a circumference of 60.32 millimeters.
The radius of a circle is half of its diameter. If the radius is given as 16.3 millimeters, that means the distance from the center of the circle to its edge is 16.3 millimeters. Therefore, the radius itself is simply 16.3 millimeters.
Radius = 1/2 of the diameter = 328/2 = 164 millimeters
The circumference of a circle with a radius of 175 millimeters is about 1,100 mm (C = r x 2 x Pi).
A of a circle is (pi)r2 r = 4 millimeters A = (4 millimeters)2 pi A = 16pi millimeters2 pi is roughly 3.141592 A= 50.265472 millimeters2