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直线与平面垂直的折纸实验
Author:
孟宝兴
GeoGebra
New Resources
兩位數除以一位數（一）
拼砌四邊形
画直线等分三角形的面积
找出對稱軸
異分母分數減法
Discover Resources
正八面體
垂心即內心
directed number_the age of father and son
模拟时钟
蜗牛壳模型
Discover Topics
Congruence
Pie Chart or Circle Chart
Tree Diagrams
Symmetry
Limits