Radius
The distance from the center of a Circle to its Perimeter, or from the center of a Sphereto its surface. The radius is equal to half the Diameter.
See also Bertrand's Problem, Circle, Circumference, Diameter, Extent, Inversion Radius,Kinney's Set, Pi, Radius of Convergence, Radius of Curvature, Radius (Graph), Radiusof Gyration, Radius of Torsion, Radius Vector, Sphere- Random Percolation
- Random Polynomial
- Random Variable
- Random Walk
- Random Walk--1-D
- Random Walk--2-D
- Random Walk--3-D
- Range (Image)
- Range (Line Segment)
- Range (Statistics)
- Rank
- Rank (Group)
- Rank (Quadratic Form)
- Rank (Sequence)
- Rank (Statistics)
- Rank (Tensor)
- Ranunculoid
- RAT-Free Set
- Ratio
- Ratio Distribution
- Rational Approximation
- Rational Canonical Form
- Rational Cuboid
- Rational Distances
- Rational Domain