Numbers

Perfect Square

• Squares of whole numbers

Square root• One of two equal factors of a number. If

a squared equals b then a is the square root of b. The square root of 144 is 12 because 12 squared is 144.

Radical Sign

• The sign used to represent a nonnegative square root.

Principle Square Root

• A nonnegative square root

Irrational Number

• Numbers that cannot be expressed as a/b.

Real Number• Irrational numbers together with

rational numbers to form the set of all numbers.

Natural Numbers

• 1, 2, 3, 4...

Whole Numbers

• 0, 1, 2, 3, 4, 5...

Integers

• The whole numbers and their opposites. • ...-3, -2, -1, 0, 1, 2, 3...

Rational Numbers

• Any number that can be expressed in the form a/b where a and b are integers and b is not equal to 0.