the ellipse - swlauriersb.qc.ca materials/sbracken... · the foci of an ellipse are always on the...
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The foci of an ellipse are always on the major axis:
major axis = 2a
in this case!
Foci are ALWAYS on the major axis
Sum of the focal radii
length of major axis
In general, the equation ofany ellipse with centreat the origin:
a = centre to leftOr right side
b = centre to top or bottom
c = centre to focus
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