利用直尺和對摺或旋轉圖形,探究各類四邊形的特性。 http://www.geogebratube.org/material/show/id/18992 (Download GeoGebra file)
http://www.geogebratube.org/material/show/id/18975 (Download GeoGebra file)
http://www.geogebratube.org/material/show/id/18989 (Download GeoGebra file) 平行四邊形有甚麼特性?
http://www.geogebratube.org/material/show/id/18987 (Download GeoGebra file) 梯形有甚麼特性?
|