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quadrilaterals 2

Author:iedc

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兩組對邊相等和有直角的四邊形
畫出對稱圖形
判斷球體
異分母分數減法
兩位數除以一位數（一）

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三棱锥的三视图
P6 圓周01A
square & Triangle
垂心應用
诱导公式三（x轴对称关系）

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Probability
Trigonometry
Geometric Transformations
Sequences and Series
Vectors 3D (Three-Dimensional)

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