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內心
Author:
Jensen Wong
GeoGebra
New Resources
三位數除以一位數（一）
拼砌四邊形
四邊形的特性
畫出對稱圖形
找出對稱軸
Discover Resources
角α与-α的正弦函数关系
點到直線的距離 8：觀察平行線常數項的差距
Area and Volume of a pentagonal prism(正五角棱柱的面積和體積)
劉虹圻 垂心
少了一個質數One less prime number
Discover Topics
Incircle or Inscribed Circle
Curve Sketching
Differential Calculus
Distributions
Piecewise Functions