A sector of a circle is <span> the portion of a disk enclosed by two radii and an arc, where the smaller area is known as the minor </span>sector<span> and the larger being the major </span>sector<span>. </span><span>The area A of a circle with radius r is given by A = πr2. The circumference C of that same circle is given by C = 2πr. But these are the formulas for the entire circle. Sometimes you will need to work with just a portion of a circle's revolution, or with many revolutions of the circle.</span><span> </span>
