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任务12：手拉手模型
Author:
陈丽婷
GeoGebra
New Resources
第八周作业
撒针估算面积实验
第三周作业效果演示
异形操场
第八周作业1
Discover Resources
柏拉圖多面體 Platonic Solids
五上_分數乘法(教師版)
Conjecture (Tropical Hoehn's Conjecture)
祖暅之《綴術》：「緣冪勢既同，則積不容異。」
平分线段或角
Discover Topics
Trapezoid
Planes
Curve Sketching
Parametric Curves
Straight Lines