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橢圓軌跡
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GeoGebra
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【案例】2018年全国1卷理科12题
球体的体积推导（优化版）
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
畫出對稱圖形
Discover Resources
角平分線分點比例
How to draw an octagon with ruler and compasses?
Locus (Two points 1)
垂心(劉虹圻623)
拋物線2--焦點法
Discover Topics
Planes
Logarithm
Plane Figures or Shapes
Symmetry
Median Line