Radius is a mathematical term that refers to the distance from the center of a circle or sphere to its outer edge. In geometry, it is represented by the symbol ‘r’ and is used to calculate the circumference, area, and volume of a circle or sphere. In the digital world, the term ‘virtual linear’ is often used interchangeably with radius, referring to the distance from the center of a virtual object to its outer boundary. This term is commonly used in computer graphics and virtual reality to describe the size and position of virtual objects. In essence, radius and virtual linear both describe the extent or reach of a circular or spherical object, whether in the physical or digital realm.