1. Aim: How do we find the length of secants?

2. A secant is a line passing through two points circle.
A tangent to a circle is a line that intersects the circle in exactly one point.
A secant is a line passing through two points circle.
Secant Line

3. Lengths of Secants EB• EA= ED• EC
If two secant segments share the same _______ outside a circle, then the product of the length of one ______ segment and the length of its _______ segment ______ the product of the length of the other secant segment and the length of its external segment.
endpoint
secant
external
equals B A E
EB•
EA=
ED• EC C D

4. What is the length of CB? A E D C B 12 5 15

5. What is the length of EB? A E D C B 10 5 3

6. Test Thursday 5/15 (1 Day) Final Exam May 29th & 30th
Circles:
Equation of the Circle
Angles formed by radii, chords, tangets and secants
Properties of Chords
Segment Length of chords, tangents and secants
Similarity, Parallelograms