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固定面積的圖形周界變化
Author:
phcheng
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
四邉形 (四年級) 教師版
第八周作业
異分母分數減法
三位數除以一位數（一）
柱體建築師
Discover Resources
表示數線上的位置
straight line
同弓形內的圓周角
S4 Quadratic Function
表内除法
Discover Topics
Exponent
Constructions
Trigonometry
Statistical Characteristics
Indefinite Integral