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ptcc trigo level 2
Author:
Cheung Wing Chuen
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
画直线等分三角形的面积
四邉形 (四年級) 教師版
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Solving Triangles (SSA case) 解任意三角形(SSA情況)
心電感應
练习
雙曲線3-等軸法
夾擠定理 (The Squeeze Theorem)
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Cube
Combinatorics
Real Numbers
Natural Numbers
Plane Figures or Shapes