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32鄭羽甯
GeoGebra
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异形操场
常见四边形是否是双心四边形
第八周作业2
龙形曲线-分形龙2
平行線的判定
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全等三角形
總結
橢圓軌跡_過圓內一點與圓內切
angle in semi-circle
拋物線6--包絡線法
Discover Topics
Logarithm
Cube
Surface
Quadratic Equations
Cosine