Every point on a number line corresponds to a unique real number. A line is an infinite set of points and the set of real numbers is also infinite. Thus, there exists a one-to-one correspondence between the set of real n... More »

A number line is a straight line that graphically represents real numbers as a series of points whose distance from an origin or "zero point" is proportional to their value. The line is useful for addition, subtraction a... More »

Negative numbers are real numbers. The set of real numbers includes all the numbers that can be shown on a number line including both positive and negative numbers. More »

A nonterminating decimal refers to any number that has a fractional value (numbers to the right of the decimal point) that will continue on infinitely. The most well-known example of one of these numbers is pi; another e... More »

The standard form of a decimal number places the decimal point after the first digit and then reflects the true size of the number by multiplying it by the appropriate power of 10. This form of a number is also known as ... More »

Pi is a real number, as all numbers that exist on a number line are real. Real numbers include all rational and irrational numbers; pi is defined as an irrational number. More »

Vectors are often used in navigation. In many cases, they are easier to relay than instructions based on grid systems. Sports teams and sport commentary rely on vectors as well. More »