10.1 Notes Secant: a line that intersects a circle at two points.
10.1 Terms to know exterior points-points that lie outside a circle. interior points-points that lie inside a circle. chord- a segment whose endpoints are on the circle. diameter-a chord that passes through the center of a circle. radius-a segment with one endpoint at the center of the circle and the other endpoint on the circle. tangent-a line which intersects a circle at exactly one point. point of tangency-the point where the tangent intersects the circle. common external tangent-a line that is tangent to two circles and DOES NOT intersect the segment connecting the two centers. common internal tangent-a line tangent to two circles that DOES intersect the segment connecting the two centers. secant-a line that intersects a circle at two points.