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过圆上一点作切线,三步
Author:
u.jianwang
GeoGebra
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四邊形的特性
異分母分數減法
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
錐體建築師
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圓柱體表面面積
過圓內c點的弦中點軌跡
tytyty
分數應用題:比較兩數的大小
S0G5平均不等式(无字证明)
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Reflection
Geometric Transformations
Quadrilaterals
Scalene Triangles
Straight Lines