Circles chapter 15
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This document defines key terms related to circles: a circle consists of all points equidistant from a center point, with a radius connecting the center to points on the circle. A diameter stretches across the center, while a chord connects two points on the circle. A secant intersects a circle at two points, whereas a tangent touches the circle at just one point called the point of tangency. Congruent circles have the same radii, and concentric circles share the same center.
Circles chapter 15
- 2. A Circle is a set of all points in a plane at a certain distance (the radius of the circle) from a center point (the center of the circle).
- 3. A Radius of a Circle is a segment whose endpoints are the center of the circle and a point on the circle.
- 4. A Diameter of a Circle is a segment containing the center and whose endpoints are point on the circle.
- 5. A Chord is a segment whose endpoints are points on the circle.
- 6. A Secant is a line that intersects a circle in exactly two points.
- 7. A Tangent to a Circle is a line in the plane of the circle that intersects the circle at exactly one point. The point of intersection is called the Point of Tangency.
- 8. A Ray or a segment is tangent to a circle if it is subset of a tangent line and contains the point of tangency.
- 10. Congruent Circles are circles with congruent radii.
- 11. Concentric Circles are two or more circles with the same center.