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弹簧变化
Author:
zgc112
GeoGebra
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錐體建築師
異分母分數減法
画直线等分三角形的面积
兩組對邊相等的四邊形
算柱 (兩位數)
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第12届美国中学生数学邀请赛题
IQ 波形合成圖
Measuring Volume 4
擲銀實驗
漂亮的摇摆曲线
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Hyperbola
Parallelogram
Quadrilaterals
Frequency Distribution
Quadratic Functions