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Author:
chen mingchuan
GeoGebra
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平行線的判定
斐波那契螺旋弧线(表格法)
百分數及其應用
折扣
比較五件物件的重量
Discover Resources
史坦納圓鍊 (Steiner Chain)
蝴蝶定理證明1:Steven構造恒等式
平面直角坐标系
異分母分數加法
Parallelogram
Discover Topics
Cosine
Power Functions
Logarithm
Right Triangles
Sequences and Series