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三角形三边关系
Author:
许春兰
GeoGebra
New Resources
第八周作业2
撒针估算面积实验
双心四边形
第八周作业3
活动三：应用性质
Discover Resources
包含除法（整數或分數 ÷ 分數）
Is this a prism 4
Geometry : Types of Angles (幾何：角的種類)
中國剪紙技術_蝴蝶花
双动点异速折线运动分段函数绘制
Discover Topics
Symmetry
Optimization Problems
Parametric Curves
Multiplication
Linear Functions