It is 28.3 cm, approx.
Doubling the radius doubles the circumference.
9*pi or 28.27 cm (to 2 dp)
56.549 cm
Construct a circle with a 4.5 radius. The circle's circumference is 360 degrees. So mark out 3 by 120 degrees on the circumference and join them to the centre of the circle which will divide the circle into three equal parts.
Diameter of a circle = circumference/pi
Doubling the radius doubles the circumference.
9*pi or 28.27 cm (to 2 dp)
56.549 cm
The circumference of a circle that is 9 cm wide is: 28.274 cm
56.549 cm
Construct a circle with a 4.5 radius. The circle's circumference is 360 degrees. So mark out 3 by 120 degrees on the circumference and join them to the centre of the circle which will divide the circle into three equal parts.
Diameter of a circle = circumference/pi
Diameter of a circle = circumference/pi
The circumference of a 13.5 diameter circle is: 42.41(diameter x pi = circumference).
A circle with a circumference of 11.25 has a diameter of: 3.581
If the diameter of a circle is 9 the circumference is: 28.3
If a circle has a diameter of 5 the circumference is: 31.4