When during the cell cycle does the centeromere break? ?

Hmm how far have you gotten into this problem?

The centromere is broken when going through the stage of Anaphase

The centromeres breaks, releasing the sister chromatids as individual chromosomes

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the