都是拐角处的意思，但用法却不一样： in the corner:在里面的拐角处：比如说屋里面的拐角处有一张桌子 There is a table in the corner of the house on the corner:在拐角之上。如在桌子角上放着个杯子 There is a cup on the corner of the table at he corner:在拐角外面，如问路回答：请在前面的拐角处左拐 Please turn left at the corner of the house.
