How to Find the Diameter of a Circle & Distance
The diameter of a circle is the distance between any two points on the circle's perimeter through the center of the circle. You can calculate the diameter of a circle based on other information you know about that circle. Therefore, you can calculate the diameter of a circle if you know the circle's radius, circumference or area.
Other People Are Reading
Instructions
-
-
1
Calculate the diameter of the circle based on the radius of the circle. The radius of a circle is the length from any point on the perimeter of the circle to the center of the circle. The diameter of a circle equals two times the radius of the circle. For example, if the radius of the circle is 5 inches, 2 x 5 = 10 inches. This figure represents the diameter distance of the circle.
-
2
Calculate the diameter of the circle based on the circumference of the circle. The circumference is the measurement around the perimeter of the circle. The diameter of a circle equals the circumference measurement divided by the number pi. For example, if the circumference of the circle is 10 inches, 10 / 3.142 = 3.183 inches. This figure represents the diameter distance of the circle.
-
-
3
Calculate the diameter of the circle based on the area of the circle. The area is the measurement of the space inside the circle. The diameter of a circle equals the square root of four times the area divided by pi. For example, if the area of a circle is 50 inches squared, 4 x 50 = 200. Divide this figure by pi: 200 / 3.142 = 63.6537. The square root of this number is 7.978. This figure represents the diameter distance of the circle.
-
1
