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Geometry 10.4-10.5

Those darn circles :)

QuestionAnswer
Interior intersections If there are two lines or segments that intersect inside a circle (like a wonky 'X'), what formula would you use to find the angles? Add the two opposite arcs of the angle and divide the sum by two
Exterior intersections what is the formula for finding exterior angles in "arcs and angles"? big arc minus small arc divided by two (big-small)/2
Segment lengths 'X' lengths formula a x b = c x d
Segment lengths "bird beak not touching sides" lengths formula a(a+b) = c(c+d) a and c are outside of the circle
segment lengths "one is a tangent" lengths formula a^2 = b(b+c) a and b are outside of the circle, a is on the tangent side
REMINDER! PAY CLOSE ATTENTION TO THE GIVENS AND NUMBERS FOR THE BIG CIRCLES!
For finding the value of x in arcs and angles. Don't forget to distribute the negative to both pieces!
Created by: CrabRang00n
 

 



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