Tangents • A line is tangent to the circle if it intersects the circle in exactly one point (point of tangency) B AB is tangent to P. A P
Tangents **If a line is tangent to a circle, then it is perpendicular to the radius down to the point of tangency. (Converse is also true)
Tangents • If 2 segments from the same exterior point are tangent to a circle, then they are congruent. A AB BC B C
Examples 66 E P M L 15 36 K 1.) m MKL 2.) m EKM 3.) EL 4.) m of arc KPE 5.) KML 6.) KM 7.) KLE is a(n)triangle.
Examples 8.) 9.) 10.) C 7 C 12 X X 16 16 H S 4000 6400 E HS=