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Author:
chen mingchuan
GeoGebra
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四邊形的特性
近似值：有效數字
算柱 (兩位數)
【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
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內心
Classifying Quadrilaterals
圓柱截橫
製作對稱圖 LEVEL 3
旁心
Discover Topics
Definite Integral
Root
Volume
Arithmetic Operations
Cylinder