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Author:
luodeqin@keleshuxue.com
GeoGebra
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球體建築師
兩組對邊相等和有直角的四邊形
球体的体积推导（优化版）
【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
Discover Resources
全等三角形: 重溫
廣義角
Question of the shelter
等軸雙曲線
HOMEWORK
Discover Topics
Arithmetic Operations
Centroid or Barycenter
LCM and GCD
Ellipse
Volume