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? $\endgroup$– Michael BächtoldFeb 8 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 BFeb 8 at 13:34
5$\begingroup$ please do not double-post math.stackexchange.com/questions/4634929/… $\endgroup$– David SteinbergFeb 8 at 18:28
2$\begingroup$ Another silly follow up question: how math expressions are written in cultures with right-to-left writing? $\endgroup$– Rusty CoreFeb 9 at 21:26
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.