Delta Symbol

The Delta symbol is one of the most used symbols in calculus, physics, astronomy, chemistry, geography, genetics, and other numerous branches of science. Delta is the 4th letter of the Greek Alphabet and the symbol which sometimes is used to represent the Number 4.

The common sign for Delta is a geometrical triangle. However, the symbol also includes a number of other written versions like its upper case Δ, the lower case 𝛅, or superscript ᵟ, or its Italicized version 𝛿, or ƍ (which is called the Latin Delta).

The origins of this letter can be traced back to the epochs of the Phoenician written symbol known as Dalet which was represented by a simple triangle. It is also considered that Delta symbol is the one, which gives origins to the Latin letter D and the Cyrillic letter Д.