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垂直線的斜率
Author:
Anthony OR 柯志明
拖拉紅色 C 點,令兩線垂直。 兩垂直線的斜率有甚麼關係?
GeoGebra
柯志明 香港 GeoGebra 學院
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အခြေခံ data အခေါ်အဝေါ်များ
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Toroidal Spiral
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Loc Geometric: Arii Echivalente.
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Untitled
translation along a vector
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Copy2 of Alex tool 3
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