👉 The term "ex-radius" is a mathematical concept in geometry that refers to the radius of an ellipse. It can be defined as the distance from the center of the ellipse (the point where the major axis intersects) to any point on its perimeter, or equivalently, it's the length of the semi-major axis of the ellipse. This term is often used to describe the size of a circle that has been stretched or compressed by an amount equal to its radius. In geometry, the ex-radius
