1. Module 19: Lesson 4 Segment Relationships in Circles
Chord-Chord Product Theorem
If 2 chords intersect inside a circle, then the products of the lengths of the segments of the chords are equal. B A C
AC · CE = BC · DC E
See example 1 page 1043 D

2. Secant-Secant Product Theorem
If 2 secants intersect in the exterior of a circle, then the products of the lengths of one secant segment and its external segment equals the product of the lengths of the other secant segment and its external segment.
BC · AC = CE · CD A B C D E
See example 3 page 1045

3. Secant-Tangent Product Theorem
If a secant and a tangent intersect in the exterior of a circle, then the product of the lengths of one secant segment and its external segment equals the length of the tangent segment squared. A
See example 4 page 1046 B C D

4. Homework pages 1049-1053 #’s 5-20 (all)