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Tutkitaan nelikulmioiden luokittelua.
Tämän aihion avulla voit tutkia erilaisten nelikulmioiden määritelmiä.
Miten määrittelet?
[list]
[*]nelikulmion
[*]suorakulmion
[*]suunnikkaan
[*]puolisuunnikkaan
[*]neliön
[/list]