Chapter 9 Section-6 Angles Other.

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Presentation transcript:

Chapter 9 Section-6 Angles Other

A Theorem 9-9: The measure of an angle formed by 2 chords that intersect inside a circle is equal to half the sum of the measures of the intercepted arcs B 1 D C

Theorem 9-10: The measure of an angle formed by 2 secants, 2 tangents, or a secant and tangent drawn from a point outside of the circle is equal to half the difference of the measures of the intercepted arcs Case I Case II Case III D B C 2 A B D C 1 B A C 3

120º 100º A A D B 1 75º 160º C C B

B D 1 C

(5x+6)º D A A S D X 94º B Y C C B (2x)º

D E B 8 6 3 5 7 4 2 1 100º 30º A C O 25º G

Section 9.6 Written Exercises (p. 359-360) #1-24 (all) :9-6 Angles & Segments: Homework Homework: Section 9.6 Written Exercises (p. 359-360) #1-24 (all) 9.5 Practice worksheet