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trapezium
Author:
iedc
GeoGebra
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兩位數除以一位數(二)
拼砌四邊形
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
球体的体积推导(优化版)
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a>1, y=Log(a,x) and y=a^x 有可能0,1,2交點!?
angle sum of triangle
定周长的正多边形面积变化规律(含圆)
圆锥曲线1
S5R1L4圆内迭代反射——朱老师
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Random Experiments
Rotation
Orthocenter
Logic
Secant Line or Secant