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固定周界的長方形面積變化
Author:
phcheng
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
球體建築師
錐體建築師
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
Discover Resources
小四小數
P2 math
Exponential graph
串珠(兩種顏色)
拋物線
Discover Topics
Fractions
Rational Numbers
Means
Optimization Problems
Trapezoid