Pi is an irrational number.
The number π or pi is a mathematical constant that is the ratio of a circle’s circumference to its diameter (π = C/d). The ratio is a constant no matter what size of circle is used. Pi is also called Archimedes’ constant. Although pi is often approximated as 3.14159, its […]

Pi Facts – What Is the Number Pi?

Adding Positive Negative Numbers
Positive and negative numbers are two broad classes of numbers that are used in math and also everyday transactions, like managing money or measuring weight. A positive number has a value greater than zero. Its sign is positive, but it is usually written without a plus sign in front of […]

Rules for Positive and Negative Numbers