(10) "it was then whenirealisedyouwerenotthemanidthoughtyoutobe"
she has come to the conclusion that the real tesman, and the tesman she thought he was, are two very different people. he would not protect her the way she thought he would, he did not love her the way she thought he did. he loved the idea of her, the idea of an idealistic life, with a obeying wife, not her.
shows her having her epiphany moment, this is when she finally realises she's been living a deluded life
(11) "you mustn't feelboundtomeinanyway, however small, just as ishallnotfeelboundtoyou. we must both bequitefree. here isyourringback"
'here is your ring back', this 'ring' symbolises their entire relationship, not only does a ring seal a marriage, torvald viewed nora as an object, some pretty to look at and something other people would be jealous of. when nora physically returned the ring, this is her taking control over herself, no longer will she be viewed this way by him, something so simple conveys the end of their relationship