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GeoGebra
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圓的基本性質
常见四边形是否是双心四边形
第八周作业3
活动三：应用性质
斐波那契螺旋弧线（表格法-可动态调节）
Discover Resources
「ASS」
Compound Inequalities
Clown
二元一次方程式及其解的意義
三角形面積(由面積求高)
Discover Topics
Multiplication
Statistical Characteristics
Means
Sequences and Series
Equilateral Triangles