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square & Triangle

Author:Alex Leong

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兩組對邊相等的四邊形
直角坐標平面上的旋轉變換
四邊形的特性
【案例】2018年全国1卷理科12题
四邉形 (四年級) 教師版

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RECTANGLE
二元一次不等式
Compare areas by cutting shapes Q1
向量点乘
四邊形的邊長與限制

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Quadrilaterals
Sine
Tangent Function
Rational Numbers
Trigonometry

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