Circumference: 2*pi*3 = 6*pi inches Area: pi*3 squared = 9*pi square inches
18 inches
the circumfrence of a circle is pi times it's radius squared.
The circumference of a 9 circle is: 28.3
6 inches pi*32 = 9*pi square inches (smaller circle) pi*62 = 36*pi square inches (larger circle)
A circle with a radius of 9 inches has a circumference of 56.55 inches and a diameter of 18 inches.
C = ~56.55 inches.
2 inch radius = 12 9/16" circumference & an area of 12.56637 sq. inches.
r2*pie=circumference 9(9)*pie 81*pie 254
C = 2*pi*r Plug in.
Circumference is 2 times pie (which is often rounded to 3.14) times the radius. The result is 56.52 inches.
It is the name given to the straight line from the centre of a circle to its circumference when that distance is 36 inches.
Circumference of 9 inches: 2.864788975654119in. (for pi I used 3.14159265358979) Diameter of 9 inches: 4.5in.
If a circle has a circumference of 18pi, the radius is 9.
Doubling the radius doubles the circumference.
The radius is 1.43
Circumference = 2Π• radius 2Π•9 = (18×Π)"≈ 56.5"