circumference formula is pi(diameter)
diameter is 2(radius)
radis=4; diameter=2(4)=8
pi(8)=circumference of the circle...this is the EXACT answer
plug it into a calculator and you will get
25.1327412287
your welcome ;)
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A circle that is 25.13272 cm in circumference.
The formula for circumference of a circle is 2πr. Since the radius is 4, the circumference is 8π or approximately 25.12 inches.
4 cm radius = Area of 50.26548 sq. cm.
The circumference of a circle with a radius of 4 ft is: 25.13 feet (r x 2 x Pi = circumference).
Circumference of a circle = 2*pi*radius = 8*pi or 25.13274123 units