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凹四边形
Author:
张老师
GeoGebra
New Resources
科赫雪花
活动三：应用性质
常见四边形是否是双心四边形
折扣
第八周作业
Discover Resources
so fing
李樂雯_尋找PI的活動
Angles in a Circle:Property 1
指数函数的副本
双心四边形
Discover Topics
Rotation
Reflection
Inequalities
Scalene Triangles
Triangles