1-2 Understand Irrational Numbers

Natural Numbers (Counting Numbers)

1, 2, 3, 4, 5, 6, 7, 8, 9, etc. Whole numbers that are not negative.

non-terminating decimal

A decimal number that continues infinitely, or without end.

Perfect Square

A rational number whose square root is a whole number

Integer

All whole numbers (both positive and negative) and zero.

rational number

Any number that can be expressed as a ratio of two integers. A number that either terminates OR is repeating.

Decimal Expansion

Writing a rational number in decimal form. Converting a fraction to it's decimal form ie. 3/4 = .75

non-repeating decimal

a decimal that does not have digits that repeat forever

Irrational Number

a number that can NOT be expressed as a ratio of two integers or as a repeating or terminating decimal - Pi or any square root of an imperfect square are considered irrational

square root

a number that when multiplied by itself equals a given number