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m FEBm DC
m STU
WARM UP
Geometry by Holt, 2007
6.2 Tangent Properties... pg. 313
What are tangents?-line outside the circle that touches the circle
ONE time at the point of Tangency
point of tangency
Tangent
A
B
Tangents, chords, secants
Tangent have 2 very important properties:
1. The tangent forms a 90° when the point of tangency intersects the radius
2.When you have 2 tangents their segments are ≅ if they go through the same exterior point.
90° extends to tangents not to edge of circle
Tangent Segments
BTW-- keep your eyes open for the kite/circle problems---they pop up alot
Remember you have to switch your thinking back and forth from circle properties to kite properties
radii
tangent segment
central angle
4.
http://my.hrw.com/math06_07/teacher/osp/geo/data/chap11/section01/reteach.pdf
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