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轨迹17
Author:
万超杰
GeoGebra
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平行線的判定
正方形雪花图案
活动三:应用性质
百分數及其應用
斐波那契螺旋弧线(表格法)
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初二奥数:全等三角形
判斷柱體 9
常數函數平移(進階)
謝爾賓斯基三角形(Sierpinsky)
球體
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Sphere
Rectangle
Orthocenter
Arithmetic
Sequences and Series