Algebra 1 Chapter 0 Vocabulary

Positive number

A number greater than zero.

Negative number

A number less than 0

rational number

A number that can be written as a fraction

Probability

A number that describes how likely it is that an event will occur

percent

A ratio that compares a number to 100

perfect square

A rational number whose square root is a whole number

circle

A round plane figure whose boundary consists of points equidistant from the center

diameter

A straight line passing from side to side through the center of a circle or sphere.

real numbers

All rational and irrational numbers

irrational numbers

Any real number which can't be expressed as a fraction of two integers

Defining a variable

Choosing a variable and deciding what the variable represents.

four-step problem-solving plan

Explore, Plan, Solve, Examine

percent proportion

One ratio or fraction that compares part of a quantity to the whole quantity. The other ratio is the equivalent percent written as a fraction with a denominator of 100.

volume

The amount of space an object takes up

absolute value

The distance a number is from zero on a number line

circumference

The distance around a circle

perimeter

The distance around a figure

Radius

The distance from the center of a circle to any point on the circle

principal square root

The nonnegative square root of a number.

area

The number of square units required to cover a surface.

Natural Number

The set of numbers 1, 2, 3, 4, ... Also called counting numbers.

Integers

The set of whole numbers and their opposites

surface area

The sum of all the areas of all the faces or surfaces that enclose a solid.

additive inverses

Two numbers whose sum is 0 are additive inverses of one another.

square root

a number that when multiplied by itself equals a given number

graph

instrument for recording data with coordinates

odds

the probability of a specified outcome

coordinate

the real number that corresponds to a point

sample space

the set of all possible outcomes of a probability experiment

opposites

two numbers that have the same absolute value but have different signs