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固定面積的圖形周界變化
Author:
GeoGebra Institute of Hong Kong
Topic:
Area
,
Perimeter
,
Square
GeoGebra
New Resources
直角坐標平面上的旋轉變換
【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
錐體建築師
Discover Resources
IMO2015C
不等式
工具：PlaneString
谢庆GGB绘本一
常见四边形是否是双心四边形
Discover Topics
Difference and Slope
Rotation
Parallelogram
Centroid or Barycenter
Combinatorics