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劍宗30
Author:
suc
GeoGebra
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活动三：应用性质
双心四边形
斐波那契螺旋弧线（表格法-可动态调节）
平行線的判定
常见四边形是否是双心四边形
Discover Resources
七巧板揖人
駐波
蜥蜴
拋物線3-平行四邊形法
Copy of 正方體的反射對稱2
Discover Topics
Curve Sketching
Surface
Geometric Transformations
Sequences and Series
Optimization Problems