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Author:
朱亮
GeoGebra
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兩組對邊相等的四邊形
算柱 (兩位數)
異分母分數減法
【案例】2018年全国1卷理科12题
兩位數除以一位數（一）
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Angles in the Circumference and the Centre
可變大的圓桌
Ellipse_Vertical
venn图着色
球面截痕
Discover Topics
Calculus
Arithmetic
LCM and GCD
Definite Integral
Quadrilaterals