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四則
Author:
周錦鋒
GeoGebra
New Resources
百分數及其應用
平行線的判定
双心四边形
盈利與虧蝕
正方形雪花图案
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multiplication of complex number in unit circle
波羅摩及多定理
蝴蝶定理推廣證明2(交比)
BkD_act15_04c
六年級_截面_錐體_多邊形
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Perimeter
Geometry
Histogram
Integral Calculus
Integers