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梯形中線
Author:
李春培
梯形中線
GeoGebra
New Resources
判斷球體
異分母分數減法
球體建築師
找出對稱軸
三位數除以一位數（一）
Discover Resources
cute panda
複合圖形(四)
正弦公式(證明)
Introduction to Trigonometry from a Unit Circle
gjc097b21 點對三角形的對稱
Discover Topics
Linear Equations
Tangent Line or Tangent
Sine
Triangles
Fractal Geometry