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30 60 90 and 45 45 90
作者：
Mateusz
30 60 90
GeoGebra
最新資源
Mondrian's Puzzle
Fractal Tétraèdre. Dilatation -1/2 centre triangles
Area of a Circle Illustrated
Focus and Directrix
z`]]
探索資源
Points on a Line
Parallel Lines Demonstration 3
Fermat_Torricelli_Point_Zelch
logistic family test
Perpendicular Projection of line onto Plane
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正切線或正切
矩形
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