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圓與切線
Author:
13陳柏禎
圓與切線
GeoGebra
New Resources
Earth with coastline
畫出對稱圖形
近似值：有效數字
拼砌四邊形
第八周作业
Discover Resources
中線平方定理在圓上應用
地球20160328
Interesting Geometric Theorem
七巧板（tangram）的副本
Tangent of circle
Discover Topics
Tangent Line or Tangent
Real Numbers
Exponent
Isosceles Triangles
Differential Calculus