Arc Length and Radian Measure(The arc length discussed on this page will be in relation to a circle.)An arc of a circle is a "portion" of the circumference of the circle.The length of an arc is simply the length of its "portion" of the circumference. Actually, the circumference itself can be considered an arc length.The length of an arc (or arc length) is … [Read more...] about Arc Length and Radian Measure