參考網頁http://www.mathsgreat.com/dissect/dissect.html可以先切兩刀變成矩形http://www.mathsgreat.com/dissect/dissect_007.pdf再對矩形切兩刀變成正方形http://www.mathsgreat.com/dissect/dissect_006.pdf另外該網站也有正三角形切三刀變成正方形的方法http://www.mathsgreat.com/dissect/dissect_008.pdf