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三角形的面積
Author:
Anthony OR 柯志明
Topic:
Area
,
Triangles
GeoGebra
New Resources
垂直線的斜率
圓的切線方程
圓周公式的應用
球体的体积推导（优化版）
平行線的斜率
Discover Resources
Ratio of angles at the centre and the length of the arcs.
相似三角形(一)
作業 11032
Trapezoid1
折線
Discover Topics
Limits
Upper and Lower Sum or Riemann Sum
Subtraction
Right Triangles
Piecewise Functions