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轨迹19
Author:
万超杰
GeoGebra
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兩組對邊相等的四邊形
找出對稱軸
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
【案例】2013年安徽高考15题
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例題6
量角器1
圓內接四邊形
探索三角形外角定理
正方形穿越
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LCM and GCD
Congruence
Circle
Straight Lines
Trigonometric Functions