Secants

A secant is a line, ray, or line segment that intersects a circle in two places. Three points are covered: (1) secants that intersect in a circle which divide each other proportionally, (2) the angle formed by secants which intersects in a circle and is half the sum of the intercepted arcs, and (3) two secants drawn from the same point outside a circle that form an angle whose measure is half the difference of the intercepted arcs.

Videos

$How to define a secant; how to find the length of various secants in circles.$
$How to find the angle measures formed by intersecting secants.$
$How to find angle and arc measures formed by intersecting secants and tangents.$
$How to find the length of intersecting secant segments.$
$How to fin the length of secant segments drawn from points outside a circle.$