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OpenStudy (anonymous):
what equation do you use to find the value of "c"(when dealing with ellipses)?
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OpenStudy (anonymous):
\(c^2=a^2-b^2\)
OpenStudy (anonymous):
a real good explanation with examples worked out is here http://www.purplemath.com/modules/ellipse.htm
OpenStudy (anonymous):
thank you!
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