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圆心角
Author:
陈新华
GeoGebra
New Resources
正方形雪花图案
第八周作业1
第八周作业3
百分數及其應用
龙形曲线-分形龙2
Discover Resources
給錐體一個名字 2
分割三角柱
f-10-2-poly3-gph-bac-2&3
電子幾何條的副本
（三）观察物体
Discover Topics
Differential Calculus
Addition
Translation
Definite Integral
Optimization Problems