Triangle is a simple shape but contains a profound meaning which symbolizes strength. C pd 2pr. Common Symbols Used in Set Theory.
360 2p rad.
Set subset union intersection element cardinality empty set naturalrealcomplex number set. The triangle is an ancient symbol of Deity or the divine union. As it is virtually impossible to list all the symbols ever used in mathematics only those symbols which occur often in mathematics or mathematics education are included. 360 2p c.