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禪繞畫
Author:
tracy98733
GeoGebra
New Resources
垂直線的斜率
直線的斜率
平行線的斜率
三位數除以一位數（一）
画直线等分三角形的面积
Discover Resources
由拉線80209傅筱茿螢橋國中
證平行四邊形 (對角相等)
MTH5151trytry
任意角的三角函数
对角线互相垂直的四边形，证倍分关系的副本
Discover Topics
Fractal Geometry
Natural Numbers
Triangles
Continuity
Geometry