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勾股定理（几何原本）１
Author:
夜雨嘀嗒
GeoGebra
New Resources
第八周作业2
常见四边形是否是双心四边形
活动三：应用性质
盈利與虧蝕
撒针估算面积实验
Discover Resources
Light Game
testing
สำเนาของ 河內塔 (Tower of Hanoi)
gjc096a19 平行四邊形內截兩扇形
平移中心
Discover Topics
Curve Sketching
Distributions
Parallelogram
Multiplication
Constructions