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沪教版练习册7.4第4题
Author:
吴兴海
GeoGebra
New Resources
找出對稱軸
球體建築師
錐體建築師
兩位數除以一位數（二）
拼砌四邊形
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高中二年級向量
紙幣
圓內接四邊形任務一: 提示二
Gaussian Heptagon construction
銳角三角：sin, cos
Discover Topics
Median Line
Tangent Function
Sine
Secant Line or Secant
Polynomial Functions