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Drag the red dots, see the area ratio of EHFG to ABCD
Author:
johnmayhk
GeoGebra
New Resources
兩組對邊相等的四邊形
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
判斷球體
三位數除以一位數（二）
Discover Resources
三角形面積與內切圓半徑
正方體的反射對稱2
Jiawen Yun
圓形,三角形軌跡觀察
勝者即正義
Discover Topics
Right Triangles
Exponential Functions
Division
Quadrilaterals
Pyramid