Q:

What is Phi in math?

A:

Quick Answer

Phi is the 21st letter of the Greek alphabet and in mathematics, it is used as a symbol for the golden ratio. The golden ratio refers to a special number that is approximately equal to 1.618. It is also known as the golden section, golden mean, divine section, medial proportion, golden cut, extreme and mean ratio, golden number or divine proportion.

Continue Reading

Keep Learning

Credit: GAnay Mutlu E+ Getty Images

Full Answer

The golden ratio is obtained when a line is divided into two parts such that the longer part divided by the smaller part is equal to entire length of the line divided by the longer part. For example, two portions measuring 61.8 and 38.2 on a straight line form a golden ratio. It appears frequently in architecture, art and geometry.

Some 20th century architects and artists have proportioned their works to approximate the golden cut because they believe it is aesthetically pleasing. It is widely believed, although not proven, that the Parthenon in Greece was built with the golden ratio in mind. The golden number is also used to analyze the proportion of natural objects as well as manmade systems like financial markets.

The golden ratio is an irrational number, which is a real number that cannot be represented as a simple fraction. The digits continue with no noticeable pattern.

Learn more about Numbers
Sources:

Related Questions

• A: Prime numbers are important in mathematics because they function as indivisible units and serve as the foundation of several mathematical disciplines. Beca... Full Answer >
Filed Under:
• A: In mathematics, benchmark numbers are predefined numbers that assist in estimation of an unknown quantity. Benchmark numbers tend to be multiples of 5 or 1... Full Answer >
Filed Under:
• A: The Millennium Prize Problems are a collection of the most difficult problems in mathematics, including the Riemann Hypothesis and the P versus NP Problem.... Full Answer >
Filed Under:
• A: In mathematics, the term "interval" usually refers to a statistical confidence interval. Confidence intervals describe the likelihood of a statistical esti... Full Answer >
Filed Under:
PEOPLE SEARCH FOR