SUBJECT INDEX
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
r
Radians
Degrees as a unit of angle measure Angle definition and properties (Trigonometry) Radian - math word definition
Radical
Radical sign or symbol - math word definition Root (of a number) - math word definition Radical - math word definition Radical sign or symbol - math word definition
Radicand
Radical - math word definition Root (of a number) - math word definition Radicand - math word definition Radical sign or symbol - math word definition
Radius
Radius of a Regular Polygon Circumcircle of a Regular Polygon Radius of an Arc or Arch with calculator - Math Open Reference Semicircle - math word definition Parts of a circle - Pictorial index Radius of a circle definition and calculator Derivation of the arc radius formula Circumference (perimeter) of a circle with calculator
Range
Function Range of a function
Rate
Calculus - Related Rates - a melting snowball
Ratio
Triangle similarity, ratios of parts Ratio - math word definition Calculus - Ratio Test
Rational
Rational Number - math word definition Number Irrational number - math word definition
Rationale
The fundamental rationale behind Math Open Reference
Ray
Opposite Rays Definition Ray definition (Coordinate Geometry) How to construct (draw) a perpendicular at the end of a ray with compass and straightedge or ruler Ray - math word definition
Real
Complex numbers - animated definition Number Real-number
Real number
Imaginary-number
Reasons
Ten Reasons why technology is vital to education
Reciprocal
Reciprocal - math word definition
Rectangle
Diagonals of a rectangle with calculator Rectangles and International paper sizes Area of a rectangle with calculator. Definition and formula Rectangle - math word definition with calculator The Golden Rectangle - math word definition Area and perimeter of a rectangle. (Coordinate Geometry) Circumscribed rectangle, bounding box. (Coordinate Geometry) Perimeter of a rectangle with calculator- Math Open Reference Rectangle and its properties. (Coordinate Geometry)
Reference
Reference angle
Reflect
Reflection - a mirror image of a point Reflection - math word definition Reflection - a mirror image of a line segment Reflected Congruent Triangles
Reflex angle
Reflex Angle definition
Regular
Regular polygon area formula Regular Polygon - math word definition
Remainder
Remainder - math word definition Prime number - math word definition
Revolution
Calculus - Volumes of Revolution
Rhombus
Rhombus - math word definition Rhombus diagonals bisect each other at right angles Perimeter of a rhombus How to construct (draw) a parallel through a point with compass and straightedge or ruler (rhombus method) Rhombus area formula with calculator
Riemann
Calculus - Riemann Sums Calculus - Midpoint and Trapezoidal Riemann Sums
Riemann sum
Calculus - Riemann Sums Calculus - Midpoint and Trapezoidal Riemann Sums
Right
Right triangle definition Pythagorean Theorem - math word definition How to construct (draw) a right triangle with a given leg and hypotenuse (HL) How to construct (draw) a right triangle with a given one angle and hypotenuse (HA) Oblique versus right cone - Math Open Reference Right Angle - math word definition Oblique versus right pyramid - Math Open Reference Normal - math word definition How to construct (draw) a right triangle with two given leg lengths (LL) How to construct (draw) a right triangle with a given one angle and one leg (LA)
Right angle
Perpendicular - math word definition How to construct a 90 degree angle with compass and straightedge or ruler
Root
Root (of a polynomial) - math word definition Radicand - math word definition Root (of a number) - math word definition Radical - math word definition Root - math word definition Radical sign or symbol - math word definition
Rotate
Rotation - math word definition Rotated Congruent Triangles
Rounding
Integer
Rule
Zero-exponent Rule
Ruler
Constructions Introduction. Drawing shapes with compasses and straightedge Construction List of constructions and construction worksheets