Circle equations C2

equations of circles

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  • Created on: 09-05-11 20:24
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Circle equations
Circles touch once externally Distance between centres is equal to the sum of
the radii
Circles touch once internally if D= r1-r2
Do not intersect if D is more than the sum of the radii
Intersect twice if D is less than the sum of the radii
Line crosses circle Two solutions
Line is the tangent One solutions
Line and circle do not touch No solution


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