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三角比
Author:
pingfeng.wu
Topic:
Trigonometric Functions
GeoGebra
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圓周公式的應用
垂直線的斜率
探究三角形的全等條件
空间中两直线的位置关系
三位數除以一位數（一）
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弧度與角度
圓與切線
等棍的包絡線
组合体的表面积1
dingding_test
Discover Topics
Limits
Pie Chart or Circle Chart
Poisson Distribution
Incircle or Inscribed Circle
Perimeter