SUBJECT INDEX

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
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