Geometry More Angle - Circle Relationships
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Outside
More Angle - Circle Relationships

 

 OK, now let's say we have an angle

 that starts outside a circle.
 Like this ...
 

 

 
 In this trick, the calculation goes like this ...
 

 

 
 Example:
 Find X ...

 

 
 If the unknown piece is outside the circle
 the math is a little trickier.
 To solve one like that, 
 sometimes you need the quadratic formula ...
 
 Example:
 Find X ...

 

 
 Negative numbers don't help here,
 so we just need ...
 

 

 

   copyright 2005 Bruce Kirkpatrick

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