Relative Position of a Straight Line with Respect to a Circle

My dear students, review the relative position of a straight line with respect to a circle and do the exercises on the handout and book. The following guidelines may help you out: 1)  SECANT has 2 common points with the circle i.e. it intersects the circle at 2 points. Here, the distance from the centre of the circle to the secant is less than the radius. 2) TANGENT if it has one common point with the circle i.e. it intersects (touches) the circle at one point. Therefore, the distance from the centre of the circle to the tangent is equal to the length of the radius. 3) Line EXTERIOR of the circle has no common point with the circle i.e it doesn't intersect the circle at any point becuase it is outside the circle. In this case, the distance from the centre of the circle to the exterior line is greater than the radius.