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蝴蝶定理證明1：Steven構造恒等式
Author:
連琨銘
GeoGebra
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三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
第八周作业
拼砌四邊形
畫出對稱圖形
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整數或分數÷分數_ 工作紙（一）_題1d
Is this a prism 1
蝴蝶定理
平面向量的三點共線定理
Copy of 圓周公式應用題2
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Circle
Trigonometry
Logarithmic Functions
Pie Chart or Circle Chart
Confidence Interval