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congruent triangle_provided by Mr Yeung Kar Chun
Author:
kidmancmw
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
異分母分數減法
四邊形的特性
兩位數除以一位數（二）
兩位數加法
Discover Resources
clock
雙曲線的軌跡
太极图
Compare areas by cutting shapes Q1
孔明棋
Discover Topics
Function Graph
Normal Distribution
Quadrilaterals
Variance
Division