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外凸的正方形
Author:
宋晓燕
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
四邊形的特性
兩位數加法
異分母分數減法
兩組對邊相等的四邊形
Discover Resources
三角學
神之作
smps perimeter
a sin(bx+c) + d 的圖形的副本
竞猜游戏：说出图中角的大小
Discover Topics
Parametric Curves
Centroid or Barycenter
Bar Chart or Bar Graph
Kite
Translation