The curvature is the reciprocal of the curvature angular radius in radians. The surface area of a sphere of radius formula 8 is formula 18. It also defined the concepts of circumference, diameter, radius, and volume. The area of the circle of radius is . Let denote the surface area of the -sphere of radius . In geometry, the area enclosed by a circle of radius is . A chord of length equal to the radius made a natural base quantity. More than half of the population within the 20-mile radius remained in that area. A particle moves in a circle of radius formula 2. The TRIUMF field goes from radius with the maximum beam radius of . The shorter the radius, the sharper the curve is. The gravity depends only on the mass inside the sphere of radius . It has a minimum operating radius of and a maximum gradient of 6%. The ulna is shorter and smaller than the radius. Let formula 51 be the circle with midpoint formula 62 and radius formula 63.