Ying-Chou Sun

簡易的數學學習軟體，藉由手動操作來觀察三角形四個心的變化。●操作方法● 用手指拖曳三角形的頂點使其改變形狀。開啟內心、外心、重心、垂心等按鈕使其位置顯示在螢幕上。 藉由操作可觀察到四心相對位置的變化以

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