👉 Radiuses are a type of circle in geometry, which is a branch of mathematics that deals with shapes and sizes. They are defined as the distance from the center of a circle to any point on its circumference. For example, if you have a circle with a radius of 3 units, then it means that the length of the line segment from one point on the circumference of the circle to another is equal to 3 units. This concept can be used in various mathematical and geometric problems, such