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正弦定理
Author:
yuchengda
GeoGebra
New Resources
球体的体积推导
異分母分數減法
画直线等分三角形的面积
柱體建築師
拼砌四邊形
Discover Resources
均分除法（分數÷整數）
正n星角
托勒密定理推廣到任意四邊形一
基础知识
作线段和角
Discover Topics
Histogram
Hypothesis Testing
Triangles
Rational Numbers
Right Triangles