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Math Glossary - anyone can edit
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Radian

Radical

Radicand

Radius of a circle

Radius (polygon
)
Radix

Random

Random Sample

Range

Range of a function

Rate

Ratio

Rational Number

Ray

Real Numbers
Reciprocal

Rectangle

Rectangular Prism

Recurring Decimal

Reduce

Reflection

Reflection Symmetry

Reflex Angle

Reform math

Regroup

Regular Polygon

Regular Polyhedron

Relatively Prime
Remainder

Repeating Decimal

Revolution

Rhombus

Right Angle

Right  Triangle

Rigid

Roman Numerals

Root

Rotation

Rotational Symmetry

Rounding

Row

Ruler
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Illustrated Math Dictionary
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The glossary anyone can edit
Glossary