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30度直角三角形

Author:郭勇

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三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
第八周作业
球体的体积推导（优化版）
【案例】圆柱体内放置一个大球六个小球

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ｔｏ郁捷
角的認識
Locus (Segment)
两角和的正弦公式
翰林數學_2下_CH3-4_大邊對大角

Discover Topics

Quadrilaterals
Intersection
Rational Numbers
Conditional Probability
Expected Value

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