What is the length of the radius?

The length of the radius is a measurement of the distance from the center of a circle to any point on the circumference. It is typically denoted as "r" in mathematical formulas and calculations. The radius is half the diameter of a circle, and it plays a crucial role in determining the size, area, and perimeter of a circle. The length of the radius is essential in geometric and trigonometric calculations and is used in various real-life applications such as engineering, architecture, and physics.