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凹四边形
Author:
张老师
GeoGebra
New Resources
近似值：有效數字
兩位數除以一位數（一）
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
圓的基本慨念
[問題] 橢圓兩焦點 (6,0), (0,8)
三次多項式的切線
六角形(草稿)
y=a(x-h)²+k的副本
Discover Topics
Curve Sketching
Equations
Solids or 3D Shapes
Sequences and Series
Reflection