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等腰直角三角形
Author:
Tse Sir
GeoGebra
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兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
拼砌四邊形
小数 的副本
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四邊形的「等角分點」
根據百分率找數量（一）: 例2
時鐘
畢氏定理學生(林辰洋)
S2 Chapter11.2 選擇適當的三角比
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Translation
Differential Calculus
Line Segment
Polynomial Functions
Tangent Line or Tangent