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Pappus Chain
Author:
李俊儀
GeoGebra
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異分母分數減法
拼砌四邊形
兩位數除以一位數（二）
兩位數加法
【案例】2018年全国1卷理科12题
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齒輪連接的方法與轉動。
Is this a prism 7
拋物線(開口向上)
相似形_Tasks_Collection
S6G7三视图
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Similar Triangles
Linear Programming or Linear Optimization
Intersection
Area
Natural Numbers