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判定三角形全等的条件（AAA？）
Author:
孙敏捷
GeoGebra
New Resources
科氏力 (Coriolis Force)
常见四边形是否是双心四边形
龙形曲线-分形龙
斐波那契螺旋弧线（表格法）
第八周作业1
Discover Resources
方格紙上畫梯形2
扇形柱
中位线的副本
三角形的面積的副本
S3 Ex4.3 Q04(3D圖)
Discover Topics
Pyramid
Sequences and Series
Quadratic Functions
Algebra
Circumcircle or Circumscribed Circle