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Addition of 2 Directed Numbers
Author:
Chan Man Fai
Addition of 2 directed numbers
GeoGebra
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拼砌四邊形
兩組對邊相等和有直角的四邊形
異分母分數減法
画直线等分三角形的面积
【案例】2018年全国1卷理科12题
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複數
locus wrt two pts on two indep. circle
面積 題目4
以「時」和「分」報時的副本
雙曲線的副本
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Dilation
Linear Equations
Cylinder
Curve Sketching
Trapezoid