In The Hunger Games, when or how did Katniss and Peeta meet if they are in diffrent districts?
Unfortunately, I think you have become slightly confused. If you read the book carefully, it is clear that Peeta and Katniss are actually from the same district, District 12. If you re-read chapter two, for example, you will see that both of them are selected to be tributes to represent their district in the Hunger Games. Therefore Peeta comes from precisely the same district that Katniss comes from. Also, following Peeta's selection, you will note the way that Katniss feels bad because she remembers how nice Peeta was to her just after her father's death when she was struggling to survive and get enough food for her mother and sister. From what we can understand of this first book, the Districts are very self-contained, and it is suggested that those within them are not actually allowed to travel to other districts. This indicates that Peeta and Katniss grew up together in the same District.
I think you confused someone else with Peeta. Peeta and Katniss are in the same district. That's how they were reaped together and when they arrived at the Capitol, once Peeta said he was in love with Katniss and the huge uproar broke out
Ummmm you should re-read the book. Because your question is way off.
Correction to above:
Katniss and Peeta are both from district 12, the district of coal mining.