MathGloss/R

/Radian/ /Radical/ /Radical sign / /Radicand /

/Radius / /Radious/ /Radius (sphere) / /Random sample /

/Range/ /Range (Of Data Set)/ /Range (equation) / /Range (function) / /Range (relation) / /Range (statistics) /

/Rate/ /Rate of interest /

/Ratio/

/Rational expression / /Rational function / /Rational Number/

/Ray/ /Real Number/ /Real number plane /

/Reciprocal/ /Reciprocal (fraction) / /Reciprocal (real number)/

/Rectangle/ /Rectangle (area) / /Rectangle (perimeter) / /Rectangular number / /Rectangular prism / /Rectangular region /

/Reflection (Flip)/ /Reflexive angle /

/Region/ /Regular Polygon/ /Regular polyhedron /

/Relation / /Relation and function/ /Relative error /

/Remainder/ /Remainder (subtraction)/ /Remainder (fraction )/ /Remainder theorem /

/Renaming (whole number) / /Renaming (fraction) /

/Repeating Decimal/ /Repeating Pattern/ /Rhombus/ /Right Angle/ /Right Triangle/

/Right angle / /Right prism / /Right triangle /

/Ring/ /Root/ /Root Extraction/ /Rotation (Turn)/ /Rounding (measurement)/ /Rounding (decimals) /

/Rule (function) / /Rule of signs /

/Ruler /

/Rule of Probabilities/ /Rules of Divisibility/