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GeoGebra
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4-Stroke Engine 的副本
Author:
万物皆数
GeoGebra
New Resources
直線的斜率：水平變化 & 鉛垂變化
撒针估算面积实验
常见四边形是否是双心四边形
斐波那契螺旋弧线（表格法）
异形操场
Discover Resources
老皮
Klein Bottle
平行四邊形
三年級除法(一)：一位數除兩位數
定理介紹：切線與半徑 | Tangent and Radius
Discover Topics
Statistics
Scalene Triangles
Sequences and Series
Inequalities
Geometric Transformations