Geometry Even More Angle - Circle Relationships
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Further Outside
Even More Angle - Circle Relationships

 

 There is one more trick we can do 

 with an angle that starts outside the circle.
 

 
 The measure of angle A 
 is half the measure of angle C
 minus the measure of angle B
 In math talk, we would say:
 

 

 
 Example:
 Find angle X ...

 

 

   copyright 2005 Bruce Kirkpatrick

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