In western schools is a tradition to use Greek letters to denote angles. I wonder what about Greek schools do they also use Greek letters to denote angles or do they prefer other kind of alphabet to avoid confusion?

  • $\begingroup$ Silly follow up question: which letters do they use for x and y? $\endgroup$ Commented Feb 8, 2023 at 6:52
  • 4
    $\begingroup$ @MichaelBächtold I live in Israel and the students use x and y, even though they have a totally different alphabet. $\endgroup$
    – Amy B
    Commented Feb 8, 2023 at 13:34
  • 5
    $\begingroup$ please do not double-post math.stackexchange.com/questions/4634929/… $\endgroup$ Commented Feb 8, 2023 at 18:28
  • 2
    $\begingroup$ Another silly follow up question: how math expressions are written in cultures with right-to-left writing? $\endgroup$
    – Rusty Core
    Commented Feb 9, 2023 at 21:26

1 Answer 1


An answer to both question and first comment:

Usually, numbers or the letters phi, omega are selected to denote angles, while x and y are the standard symbols for independent and dependent variables in functions.

See for example the 10th grade (15 years old) geometry book: http://ebooks.edu.gr/ebooks/v/pdf/8547/2608/22-0236-01_Eukleideia-Geometria_A-Lykeiou_Vivlio-Mathiti/ Theorem 1 at page 26,


The Algebra book of the same grade at http://ebooks.edu.gr/ebooks/v/pdf/8547/2466/22-0270-01_Algebra-kai-Stoicheia-Pithanotiton_A-Lykeiou_Vivlio-Mathiti/ Definition at page 146.


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