#ed_op#DIV#ed_cl# #ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#這樣會剛好一半嗎?#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#假想杯子是梯形#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#沿對角線分開並不是對等的面積#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#這方法應該是適用於長方形的杯子#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl#galaxylee 寫到:水杯若是對稱的立體形狀,緩慢傾斜倒水,水面維持水平,直到水面恰好碰觸杯底#ed_op#BR#ed_cl#與杯口邊緣,就停止倒水,則所剩水必為原先一半