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侧面展开是长方形
Author:
吕玉雷
GeoGebra
New Resources
兩位數加法
第八周作业
拼砌四邊形
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
Discover Resources
三圓相切
國三2-2習作題
Geometry Exercises
複合棒形圖2
[洋葱] 根据图象求参数取值范围-上(0118)
Discover Topics
Difference and Slope
Special Points
Bar Chart or Bar Graph
Planes
Rectangle