Here are the definitions for the terms related to circles:
- Circle: A set of all points in a plane that are equidistant from a fixed point called the center.
- Circumference: The distance around the circle, which is its perimeter.
- Arc: A continuous portion of the circumference of a circle.
- Chord: A line segment connecting two points on the circumference of a circle.
- Tangent: A line that touches the circle at exactly one point.
- Diameter: A chord that passes through the center of the circle. It is the longest chord.
- Radius: A line segment from the center of the circle to any point on its circumference. It is half the length of the diameter.
- Segment: The region of a circle bounded by a chord and the arc subtended by the chord.
- Secant: A line that intersects a circle at two distinct points.
- Midpoint: The point that divides a line segment into two equal parts. In the context of a circle, it could refer to the center of a diameter or the midpoint of a chord.
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