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circle: line from centre
Author:
Ng Ching Yi
GeoGebra
New Resources
判斷球體
拼砌四邊形
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
柱體建築師
Discover Resources
以剪貼比較圖形大小
教學－橫切面
駐波:相向而行的兩行進波線性疊加而成
Homework1
作業1:內心
Discover Topics
Perimeter
Constructions
Scalene Triangles
Pythagoras or Pythagorean Theorem
Linear Equations