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2S2 3S3 角的認識 20180312 fixed
Author:
makkei
GeoGebra
New Resources
画直线等分三角形的面积
錐體建築師
三位數除以一位數（一）
第八周作业
【案例】圆柱体内放置一个大球六个小球
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triangle
sample mean T test
相似形_Tasks_Collection
圆的面积展开的副本
Copy of 「相似三角形」任务1
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Secant Line or Secant
Triangles
Congruence
Quadratic Functions
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