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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
四邉形 (四年級) 教師版
第八周作业
長方體平面投影 (Codex版)
拼砌四邊形
判斷球體
Discover Resources
指数函数
二次函數（第三階段）
邊角關係
CIRCLE
中心对称与轴对称图形.许兴华数学
Discover Topics
Centroid or Barycenter
Trapezoid
General Quadrilateral
Correlation
LCM and GCD