EE_EE please learn to read and write English before you try another language...
It will tremendously help you understand the other people around here and will also help them understand you ...
But the answer the question you've never asked before: Yes and no. My math teacher went through it, never actually told us what it was called, but gave us the resulting definitions from it. Somehow I managed to pass without it.
My personal Top 5:
1. Olivia Wilde
2. Piret Järivs
3. Miriam Weichselbraun
4. Kate Beckinsale
5. Briana Evigan