What is phi as a number?
The number phi, often known as the golden ratio, is a mathematical concept that people have known about since the time of the ancient Greeks. It is an irrational number like pi and e, meaning that its terms go on forever after the decimal point without repeating.
What does φ mean in math?
golden ratio
golden ratio, also known as the golden section, golden mean, or divine proportion, in mathematics, the irrational number (1 + Square root of√5)/2, often denoted by the Greek letter ϕ or τ, which is approximately equal to 1.618.
Is φ a real number?
Phi ( Φ = 1.618033988749895… ), most often pronounced fi like “fly,” is simply an irrational number like pi ( p = 3.14159265358979… ), but one with many unusual mathematical properties. Unlike pi, which is a transcendental number, phi is the solution to a quadratic equation.
How do you use phi?
Phi is most often calculated using by taking the square root of 5 plus 1 and divided the sum by 2:
- √5 + 1.
- BC = √5.
- DE = 1.
- BE = DC = (√5-1)/2+1 = (√5+1)/2 = 1.618 … = Phi.
- BD = EC = (√5-1)/2 = 0.618… = phi.
How do you write phi?
In the texts of ancient Greece, the letter phi looked like this:
- Φ
- Φ
- Ø
- Appropriately enough, a lower case phi, or 0.618, and the reciprocal of Phi, 1.618, can be created with Alt-618: j.
- Alt-70: F.
- Alt-102: f.
- Alt-106 or Alt-618: j.
Why 6174 is the most mysterious number?
6174 is known as Kaprekar’s constant after the Indian mathematician D. R. Kaprekar. This number is notable for the following rule: Take any four-digit number, using at least two different digits (leading zeros are allowed).
What is face Phi?
The study reveals that to calculate the Phi ratio of the nose – measure the length of the nose from its widest point to the middle of the eyebrows, and divide that by the width of the nose at its widest point – if that equals 1.618 you have the perfect nose dimensions.
What are examples of phi?
Examples of PHI include:
- Name.
- Address (including subdivisions smaller than state such as street address, city, county, or zip code)
- Any dates (except years) that are directly related to an individual, including birthday, date of admission or discharge, date of death, or the exact age of individuals older than 89.
What is included in phi?
Protected health information (PHI), also referred to as personal health information, is the demographic information, medical histories, test and laboratory results, mental health conditions, insurance information and other data that a healthcare professional collects to identify an individual and determine appropriate …
How do you calculate phi?
What is Ø in engineering?
In engineering drawings that symbol is used to denote diameter of circles in whatever the length unit of the drawing is (typically inches or mm) Form Wikipedia: Diameter symbol[edit ]