| Divide and average method | a method for approximating the square root of a number in which a number is divided to 2 more places than the number in the divisor |
| Divisor | the number by which the dividend is divided |
| Imaginary numbers | numbers that involve the imaginary unit 1 defined as the square root |
| Integer | a whole number or its opposite |
| Irrational numbers | numbers that cannot be expressed in the form where a and b are integers and b |
| Negative square | an imaginary number that shows the square root of a negative square number |
| Pi | the circumference of any circle divided by its diameter |
| Prime factorization | a way of expressing a whole number as a product of its prime factors |
| Principal Square root | the nonnegative square root of a number |
| Product property of square roots | for any numbers a and b |
| Radical | an expression in the form of the square root of a. |
| Ratio | a comparison of two qualities. |
| Rational numbers | a number that can be written with an integer in the numerator and positive integer in the dominator |
| Real numbers | the set of numbers that include rational and irrational numbers |
| reapting decimals | a decimal who’s decimal |
| square number | a number that is the product of identical |
| square root | the postive number that when multplied by itself equales a product |
| termination decimal | a decimal whose decimal |