# Math Help - Ellipse

1. ## Ellipse

Find the equation of the ellipse if the endpoints of the minor axis are (3,1) and (3,-5) and one focus is at (7,-2)

2. Originally Posted by reiward
Find the equation of the ellipse if the endpoints of the minor axis are (3,1) and (3,-5) and one focus is at (7,-2)
Center O of the ellipse is [(3+3)/2, (1-5)/2] = (3, -2)
focus F is (7,-2). So OF = 4 = ae.
b^2 = a^2 - (ae)^2
b is given. Find a.