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比較角的大小
Author:
lkkbmaths teachers 檔案儲存用
GeoGebra
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垂直線的斜率
圓的切線方程
多邊形的面積
球体的体积推导
斜率的值
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根據百分率找數量（一）: 例3
Escher 階梯
Tangent perpendicular to radius
Interesting Geometric Theorem
镂空正方体案例对比
Discover Topics
Isosceles Triangles
Rhombus
Frequency Distribution
Reflection
Step Functions