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希瓦定理
Author:
張丰耘
GeoGebra
New Resources
拼砌四邊形
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
四邉形 (四年級) 教師版
畫出對稱圖形
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雙曲與漸近線
艾雪鑲嵌
折線運動1
P4周界
扇形在射线上滚动
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Trigonometric Functions
Rhombus
Plane Figures or Shapes
Constructions
Mode