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三角形面積
Author:
lkkbmaths teachers 檔案儲存用
Topic:
Area
GeoGebra
New Resources
拼砌四邊形
球體建築師
畫出對稱圖形
三位數除以一位數（二）
兩位數加法
Discover Resources
將「文字」標示在長與寬
勝者即正義
test06
双曲椭圆
小正多边形在大正多边形内的滚动（边长相等）
Discover Topics
Isosceles Triangles
Histogram
Quadratic Equations
Normal Distribution
Cylinder