Why the words "center" and "centre" have the same sound? Why do the words "center" and "centre" have the same pronunciation?

I'm able and interested to training Portuguese or English (speaking and writing) Hello, guys, I'm here now to tell you that I'm very interested in practice my writing and speaking skills in English. So, I'd like you to know that I've already worked as an alfabethazed teacher in Brazil. Then, in spite of being a formal Portuguese teacher, I have great knowledge in this language to practice with someone who's interested in Portuguese learning. See you, Pedro. PS: I'd really appreciate if somebody corrects this short essay for me.

I'm just starting around here Hey, everyone in italki, I'm just using this amazing tool for the first time. I'd like to say it's an incredible ideia! Here we can learn languages in a fun way! So, by the way, I'm a 29 years old guy. I live in a small, peace and beatiful city in Brazil, in São Paulo's inner. I teach kids in a public school here. I'm graduated in Pedagogy and also Law, but I only work with Education, which I think that rocks! I also intend to be an English teacher in the future. That's why I applied for italki too. So, I'm still studying this language in a local school, using "ViewPoint 1", as the material, from Cambridge. I think this is it. So, I'd really appreciate if someone corrects this text mistakes and gives me some tips. See you all soon, guys! Pedro.