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平行四邊形的面積
Author:
whtong
GeoGebra
New Resources
双心四边形
祖冲之的期望：内棋与外棋
直線的斜率：水平變化 & 鉛垂變化
龙形曲线-分形龙2
直線的斜率
Discover Resources
讀量杯上的刻度 (練習)
proof*5 張華炘
Hyperbolic Spiral
Drag me~
放射狀旋轉圖形(3)
Discover Topics
Natural Numbers
Logarithm
Rhombus
Tangent Line or Tangent
Linear Programming or Linear Optimization