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橢圓折痕
Author:
alicesung0324
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
四邉形 (四年級) 教師版
判斷球體
柱體建築師
Discover Resources
梯形中線
橢圓之極偶 / polarity for ellipse
費氏螺旋線(配合試算表)
內積
P3 平行與垂直
Discover Topics
Arithmetic Operations
Intersection
Cube
Dilation
Rhombus