120.
all the letters in the alphabet are used to represent variables in algebra. also in some advanced mathematics letters from the greek alphabet are used.
None in the Roman alphabet.
In mathematical equations letters of the alphabet are used to represent numbers. Letters in the beginning of the alphabet, a, b, c...,etc typically represent Constants. Letters at the end, x, y, z..typically represent Unknowns, or variables.
The rotational symmetry of a plane object is the number of times it will look exactly like its original shape when you rotate it through 360 degrees in its plane. A whole alphabet has no rotational symmetry but some letters in an alphabet may have rotational symmetry. The number of symmetries depends on the alphabet, whether the letters are in upper or lower case as well as the font used.
It is possibly the vowels: A I E O and U
E, t, a, o, and i.
120.
There is no special term for this.
The letter E
The letters j, k, w, x and y are letters that may be described as being in the English, but not the Italian, alphabet. The letters nevertheless do get used since they may be needed for foreign loan words, such as jazz, karaoke, walkie-talkie, xeres and yuppie. Their use introduces five consonants to an alphabet that traditionally preserves five vowels and 21 consonants.
Z is used 0.07% of the alphabet
the alphabet
There is no such language as Ourmukhi. If you are talking about the Gurmukhi alphabet, it's used to write the Punjabi language.
A modified version of the Arabic alphabet is used for Persian. It is the 28 letters of the Arabic alphabet, plus 4 additional letters used only in Persian.
Most Russians use the Cyrillic alphabet, which consists of 33 letters and is derived from the Greek alphabet. It is the main writing system for languages such as Russian, Ukrainian, and Belarusian.
All of the same letters as English