If the radius of the circle is known, the diameter formula is diameter=2R, where R equals the circle's radius. If the circumference of the circle is known, the diameter is found using diameter=C/Pi, where C is the circumference and pi is approximately 3.142.
Know MoreIf the area of a circle is known, the diameter is the square root of 4A/Pi, where A is the area of the circle and Pi is approximately 3.142. The diameter of the circle is the length of the line through the center of the circle that touches two of the points on its edge The center of the circle is the midpoint of the diameter. A diameter may also be referred to as a chord, which is any line that joins two points on a circle. The diameter is the longest chord on any circle.
Learn more about GeometryThe equation for the area of a circle is pi times the square of the radius or A = πr^{2}. Calculating the area of a sector involves figuring out what fraction of the circle's area the sector covers.
Full Answer >The domain of a circle is the X coordinate of the center of the circle plus and minus the radius of the circle. The range of a circle is the Y coordinate of the center of the circle plus and minus the radius of the circle. It is easy to remember which coordinates domain and range refer to because X is alphabetically before Y, and domain is alphabetically before range.
Full Answer >To find the circumference of a circle, multiply the diameter by pi or double the radius times pi. Pi is an unchanging number that rounds off to 3.14.
Full Answer >The diameter of a circle is defined as a segment drawn through the center, touching two points on the perimeter. The length of the diameter is the same, even when changing the location of the two points.
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