What I have learned 2. A is a line that intersect a circle at only one point. is a line that intersect a circle at two points. circle, it is point of tangency. to a radius at the 3. If a line is tangent to a 4. If two tangents are drawn from an exterior point to a circle then a) the two tangent segments are b) the angle between the segment and the line joining the external and the center of the circle are 5. The measure of an angle formed by a secant and a tangent intersecting to one half the measure of the intercepted arc. point on the circle is to one half the measure of the intercepted arc.​