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waaachen
Author:
陳兪宏
艾董幾何題
GeoGebra
New Resources
三位數除以一位數（一）
第八周作业
球體建築師
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
Discover Resources
集合運算
三角形外心的角度關係
拋物線四-平行四邊形法
几何体的副本
畫出對稱圖形
Discover Topics
Line Segment
Bar Chart or Bar Graph
Differential Calculus
Curve Sketching
Centroid or Barycenter