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褶正三角形
Author:
湯士賢
GeoGebra
New Resources
球体的体积推导（优化版）
異分母分數減法
画直线等分三角形的面积
柱體建築師
【案例】2018年全国1卷理科12题
Discover Resources
Apollonius Problem 7 CCP Inversion 12
相机快门模拟
tan90
抛物面
兩組對邊相等和有直角的四邊形
Discover Topics
Combinatorics
Derivative
Vectors
Complex Numbers
Constructions