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There are a number of meanings for the word arc in mathematics. In general, an arc is any smooth curve joining two points. The length of an arc is known as its arc length. In a graph, a graph arc is an ordered pair of adjacent vertices. In particular, an arc is any portion (other than the entire curve) of the circumference of a circle. An arc corresponding to the central angle is denoted . Similarly, the size of the central angle subtended by this arc (i.e., the measure of the arc) is sometimes (e.g., Rhoad et al.
Introduction: A circle is all points equidistant from one point called the center of the circle. Segments drawn near and through the circle create other geometrical objects which we define. The Lesson: We show circle O below.A circle is named based on the name of the point which is the center.The segment OA is a radius of the circle. Definition: A radius is the segment connecting (sometimes referred to as the âdistance betweenâ) the center and the circle itself. In the diagram below, we show circle O with radius OA.ntroduction: A circle is all points equidistant from one point called the center of the circle. Segments drawn near and through the circle create other geometrical objects which we define. The Lesson: We show circle O below.