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行進波
Author:
ipc Wang
y=sin(3x-2t)
GeoGebra
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兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
畫出對稱圖形
GeoGebra笔记功能体验课件
三位數除以一位數（一）
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waaachen
題 8
優良作品3(昀潔)
test
弧度制的由来
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Mathematics
Ellipse
Geometry
Addition
Right Triangles