Basic math glossary-R

Basic math glossary-R define words beginning with the letter R

Radius: The distance from the center of a circle to the edge of a circle.

Rate: Rate means percent.

Rate of commission: A percent used to calculate the commission.

Rate of interest: A percent charged when borrowing money.

Ratio: The comparison of two numbers using division

Ray: A line with a beginning point but no endpoint.

Real distance: As opposed to distance on a map, it is the actual distance between two locations.

Rectangle: A parallelogram with four right angles.

Rectangular prism: A prism that has rectangular faces

Reflex angle: An angle whose measure is bigger than 180 degrees, but less than 360 degrees.

Remainder: The amount left over when a number does not divide another number evenly.

Rectangle: A parallelogram with four right angles.

Repeating decimal: A decimal where the same series of digits repeat

Rhombus: A parallelogram with four equal sides and opposite angles that are equal.

Right angle: An angle whose measure is 90 degrees.

Right triangle: A triangle with one right angle.

Rhombus: A parallelogram with four equal sides and opposite angles that are equal.




Buy a comprehensive geometric formulas ebook. All geometric formulas are explained with well selected word problems.





Recent Articles

  1. Least Common Multiple Worksheet

    Oct 18, 17 10:58 AM

    Least common multiple worksheet- get some practice looking for the least common multiple

    Read More

New math lessons

Your email is safe with us. We will only use it to inform you about new math lessons.

            Follow me on Pinterest


Page copy protected against web site content infringement by Copyscape





Recent Lessons

  1. Least Common Multiple Worksheet

    Oct 18, 17 10:58 AM

    Least common multiple worksheet- get some practice looking for the least common multiple

    Read More

  Our Top Pages

Formula for percentage

Compatible numbers

Basic math test

Basic math formulas

Types of angles

Math problem solver

Algebra word problems

Surface area of a cube

Finding the average 

Scale drawings

Tough Algebra Word Problems.

If you can solve these problems with no help, you must be a genius!


Everything you need to prepare for an important exam!

K-12 tests, GED math test, basic math tests, geometry tests, algebra tests. 


Real Life Math Skills

Learn about investing money, budgeting your money, paying taxes, mortgage loans, and even the math involved in playing baseball.

 Recommended

Scientific Notation Quiz

Types of Angles Quiz

Graphing Slope Quiz

Adding and Subtracting Matrices Quiz  

Factoring Trinomials Quiz 

Solving Absolute Value Equations Quiz  

Order of Operations Quiz