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同旁內角---水平平行綫
Author:
chanfushun
GeoGebra
New Resources
算柱 (兩位數)
【案例】2018年全国1卷理科12题
拼砌四邊形
兩位數除以一位數（二）
找出對稱軸
Discover Resources
圓周公式應用題2
橫斷式研究之樣本數估計（Outcome為odds ratio）
圓的展開partII
優良作品4(薇如)
Copy of 平行四邊形
Discover Topics
Kite
Tangent Line or Tangent
Median Line
Trigonometry
Step Functions