Description : What is the equation for an ellipse with center at the origin ,one focus at (1,1) and the length of semi major axise is 4.?
Last Answer : This equation is equal to the first one because it produces the same results, always. ... TL;DR - The circle equation is what you get when you multiply all terms from the ellipse equation by the radius. x^2/a^ ... ^2 = 1 is an ellipse equation. Well, a circle has a radius where a and b are the same.