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平面族
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
多邊形的面積
撒针估算面积实验
三角函数 的副本
探究三角形的全等條件
常见四边形是否是双心四边形
Discover Resources
clock
外心
sinx & cscx
Exploration of the conditions for congruent triangles.
圆锥曲线折纸操作题（教材案例）
Discover Topics
Statistics
Tangent Function
Statistical Characteristics
Scalene Triangles
Conditional Probability