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Author:
清綺楊
GeoGebra
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兩位數除以一位數(一)
三位數除以一位數(二)
兩組對邊相等和有直角的四邊形
四邊形的特性
四邉形 (四年級) 教師版
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平行與角度
斯霍滕(Schooten)定理(與角平分線定理等價)
中垂線性質
圓例9
seven-eighths sphere 八分之七球面
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Translation
Conditional Probability
Linear Functions
Angles
Curve Sketching