Introduction to Ellipses

CCSS.MATH.CONTENT.HSG.GPE.A.3

Derive the equations of ellipses and hyperbolas given the foci, using the fact that the sum or difference of distances from the foci is constant.

Precalculus.3H: Use the characteristics of an ellipse to write the equation of an ellipse with center (h,k)

Geometry G.12E Circles - show that the equation of a circle with center at the origin and radius is x^2 + y^2 = r^2.