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扇形面積
Author:
madeleineleung0928
GeoGebra
New Resources
判斷球體
拼砌四邊形
兩位數除以一位數（二）
兩組對邊相等的四邊形
錐體建築師
Discover Resources
四心的變化
Line Perpendicular to Plane 垂直於平面的直線
直线平分三角形面积
Copy of 選擇合適的「中間人」
杨桃李GGB绘本
Discover Topics
Expected Value
Fractions
Right Triangles
Algebra
Linear Functions