# Chapter 4 Exponents and Roots

## 14 terms

### Exponential Form

A number is in exponential form when it is written as a base and an exponent

### Exponent

The number that indicates how many times the base is used as a factor

### Base

When a number raised to a power, the number is used as a factor is the base

### Power

A number produced by raising a base to an exponent

### Monomial

A number or a product of numbers or variables with exponents that are whole numbers

### Scientific Notation

A method of writing very large or very small numbers by using powers of 10

### Square Root

One of the two equal factors of a number

### Principal Square Root

The nonnegative square root of a number

### Perfect Square

A square of a whole number

### Real Numbers

A rational or irrational number

### Irrational Numbers

A real number that cannot be expressed as a ratio of two integers

### Density Property

The property that states that between any two real numbers, there is always another real number

### Legs

In a right triangle, the sides that include the right angle; in an isosceles triangle, the pair of congruent sides

### Hypotenuse

In a right triangle, the side opposite the right angle