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梯形的高
Author:
鍾文欽
Topic:
Trapezium
GeoGebra
New Resources
畫出對稱圖形
直角坐標平面上的旋轉變換
拼砌四邊形
sanjiaohanshu
兩位數除以一位數（一）
Discover Resources
二次函數開口大小的變化與平方項係數的改變
直线倾斜角与斜率
各級曾參與義工活動的人數
directed number_magnet model
成大102紙最小面積
Discover Topics
Reflection
Incircle or Inscribed Circle
Distributions
Division
Ellipse