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正弦定理2
Author:
杨欣霞
GeoGebra
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正方形雪花图案
球体的截面
第八周作业3
第八周作业2
GeoGebra数学资源(4-8年级)
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perimeter
三角函數由來= =
Angle of elevation and Angle of depression(仰角和俯角)
圖形的周界
雙曲線2-交點法
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Triangles
Matrices
Geometry
Trigonometry
Quadrilaterals