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.
If 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 MoreThe radius of a circle is the distance from the center of a circle to any point on its edge. The word derives from the Latin word "radius," meaning a staff, a spoke or a stake of a wheel.
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 >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.
Full Answer >A circle that measures 10 feet across has a radius of 5 feet. The diameter is the distance from one side of the circle to the other, passing through the circle's center. The diameter equals two times the radius, so the radius equals the diameter divided by two.
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