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Author:
John Tsang
GeoGebra
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異分母分數減法
【案例】2013年安徽高考15题
兩位數除以一位數（一）
四邊形的特性
算柱 (兩位數)
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繪畫三角形的外接圓
Area of cirle
判斷柱體 9
銳角、直角和鈍角
球體表面積
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Pythagoras or Pythagorean Theorem
Secant Line or Secant
Functions
Equations
Rhombus