articles

According to History Today, William Jones created pi in 1706. This mathematics teacher used the symbol to refer to the constant ratio of any circle's circumference to its diameter. More »

www.reference.com Math Calculus

Pi Day is a nationally recognized date celebrating mathematics and the history of the mathematical term pi. Pi Day is observed and celebrated in many fun ways worldwide. More »

www.reference.com Holidays & Celebrations Holidays

Some mathematical problems that feature pi are the area of a circle, a circle's circumference, arc length and the different surface area and volume formulas for a cone, sphere and cylinder. In mathematics, the ratio betw... More »

www.reference.com Math Arithmetic
similar articles

Pi is not a rational number. It is considered irrational. A rational number is able to be written as a fraction with integers for both the numerator and denominator. More »

www.reference.com Math Numbers

The number Pi, symbolized by a Greek letter, has a constant value that approximately equals 3.14159. Pi is an irrational number, which means it cannot be expressed as a common fraction, and it has an infinite decimal rep... More »

www.reference.com Math Geometry

A math extrapolate formula is an equation used to predict the value of the dependent variable from an independent variable not found within the range of data. An example of such a formula is y=2x+5, when the range of val... More »

www.reference.com Math Calculus

The cosine of 1 is 0.99 when evaluated in degrees and 0.54 when evaluated in radians. The value can be found by using the cosine function on a calculator or by evaluating the function manually. More »

www.reference.com Math Calculus