The diameter is the same as the length, so it is 20 inches. If you meant to say that the circumference was 20 inches, then divide by pi, which is 3.1416
20 / 3.1416 = 6.4 inches
The circumference of a circle if its diameter is 20 inches is: 62.83 inches (diameter x Pi = circumference).
A 20-inch diameter circle contains: 314.16 square inches.
The circumference of a circle = pi*diameter. 6 feet 3 inches = 6.25 feet, pi*6.25 = 19.63495408 feet or the circumference of the circle is nearly 20 feet.
Area of circle: pi*10^2 = 100*pi square inches
1256 inches ++ Another Answer ++ The formula for finding the Circumference of a circle is C = Pi x D where D is Diameter and Pi is 3.1416. The Radius of a circle is one-half of the Diameter, hence the Diameter of a circle with a 20-inch Radius is 40 inches. Using the formula above, multiply 40 x 3.1416 to find the Circumference: 40 x 3.1416 = 125.664 inches.
The circumference of a circle if its diameter is 20 inches is: 62.83 inches (diameter x Pi = circumference).
If the area of a circle is 20 square inches the diameter is: 5.046 inches.
If the diameter of a circle is 20 inches, the circumference is about 62.83 inches. (C = d x Pi).
The circle has a diameter of 6.366 inches.
20/Pi = 6.37 inches
The circumference of a circle with a diameter of 20 inches is: 62.83 inches. (C = d x Pi)
using area = pi *r^2 we get: 314.1592654
A 20-inch diameter circle contains: 314.16 square inches.
10 inches The diameter of a circle is twice the radius, so 1/2 of 20 inches is 10 inches. to make this sound easier: you just take half of the diameter. for instance lets say the diameter was 5. so your thinking: how can you split a odd number in half but you just turn the diameter of 5 and turn the radius into 2.5. u with me?? hoped i helped!! :) :)
20xπ=~62.83185307179586476925286766559
There are 100*pi square inches in a 20 inch diameter circle
The radius is half the diameter. The diameter is twice the radius. If the radius is 10 inches, the diameter is twice that, or 20 inches. The radius is any straight line that connects a point on the circle with it's center. The diameter is a line segment that connects two points on a cirle throught the center of the circle.Answer:Let r be the radius of the circle and d be the diameter of the circle. We know that the diameter = 2 * radius of the circle. Given the radius r = 10 inches. Diameter d = 2 * 10 Diameter = 20 inches.