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Unformatted text preview: and its vertical angle. 40 o 60 o 50 o o o o 50 2 60 40 = + Theorem 10.14 Theorem 10.14 If 2 secants, a secant and a tangent, or 2 tangents intersect in the exterior of a circle, then the measure of the angle formed is ½ the positive difference of the measures of the intercepted arc. 140 o 30 o 55 o o o o 55 2 30 140 =Joke Time Joke Time What is an insect that’s not feeling well? Secant (sick ant) Who was a famous person that was not very healthy? “I sick” Newton...
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 Fall '10
 Towns
 Geometry, tangency

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