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ie 3
Author:
LAM YU SANG
GeoGebra
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【案例】2018年全国1卷理科12题
兩位數除以一位數（一）
柱體建築師
算柱 (兩位數)
判斷球體
Membuka sumber
分數均分
九點圓
Copy of 3S2 01a 平行四邊形 20151207
Angle between 2 planes
和直线和圆同时相切的圆