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proof 49 黃彥淇
Author:
郭亮偉
GeoGebra
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三位數除以一位數（一）
異分母分數減法
拼砌四邊形
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
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優良作品2(怡雯)
vertex of quadratic function
invariance interval
複數平面-Apple Logo
Illusion-平行线错觉
Discover Topics
Right Triangles
Frequency Distribution
Confidence Interval
Random Variables
Derivative