A circle is defined as a set of points in a plane that are all the same distance (the radius) from a central point (the center). Common examples of circles include the rims of buckets, drums, and clocks. Key terms related to circles include: - Chord: A line segment connecting two points on the circle. - Diameter: The longest chord that passes through the center. - Circumference: The distance around the outside of the circle. - Arc: Any part of the circle. A minor arc is smaller than a major arc. - Segment: The parts that a chord divides the circle into. A minor segment is smaller than a major segment. - Central angle