Well, darling, if the circumference of a circle is 13 inches, then the diameter would be approximately 4.14 inches. You can find this by dividing the circumference by pi (3.14). So grab a measuring tape and get to work, honey!
Diameter is twice the radius, therefore the radius is half the diameter. 13/2 = 6.5
Circumference = pi*13 yards
The circumference of a 13-foot diameter circle is: ~40.84 ft
The circumference is about 40.84 units.
The area of a circle with a diameter of 13 centimeters is: 132.7 cm2
The area of a circle with a 13 ft diameter is: 132.7 square feet.
The area of a circle, if it has a diameter of 13 feet, is: 132.7 square feet.
If 13 inch refers to the diameter, then the radius is one-half that amount.
Well, area of a circle is (pi)r^2 and your diameter is 13, so your radius is 13/2 so your area would be (pi)(13/2)^2 or 132.7322896 =] -ray
132.73 yards2
The circumference of a 13 inch round circle is: about 40.84 inches.To do this calculation for other circles, just multiply the diameter by Pi (about 3.1416). The result is the circumference.
The diameter of any circle is twice its radius. A circle with a radius of 13 inches will have 2 x 13 = 26 inches for a diameter.
The circumference of a circle with a diameter of 13 mm is: 40.84 mm
Circumference = 2*pi*rr(radius) = diameter/2 = 13 in/2 = 6.5 inch radiusCircumference = 2*pi(6.5 inches)= 41 inches in circumference===================
Area = pi*6.52 = 132.732 square feet to 3 decimal places
Diameter of circle: 13/pi = 4.138 ft to 3 decimal places