👉 A semiellipse is a type of ellipse that has two foci, which are located at points (h, k) and (-h, -k), where h and k are real numbers. The semi-axes of the ellipse are given by: a = √(h^2 + k^2) b = √((h^2 + k^2)^2 - a^2) where (h, k) is the center of the ellipse. The term "semi