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圆中胡不归
Author:
万超杰
GeoGebra
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常见四边形是否是双心四边形
撒针估算面积实验
比較五件物件的重量
第三周作业效果演示
科赫雪花
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P3 下學期 Ex. 5 24小時報時制
ptcc trigo level 2
線性規劃
拋物線3-平行四邊形法
Quiz on Solving One-step Linear Equations (1)
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Quadrilaterals
Rotation
Similar Triangles
Sine
Line Segment