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内凹的正方形
Author:
叶明杰
GeoGebra
New Resources
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
兩位數加法
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（二）
Discover Resources
Copy of 平行四邊形的面積
駐波
hkdse 2014 by mr lo wy
geogebra
滑桿2
Discover Topics
LCM and GCD
Continuity
Complex Numbers
Cone
Pie Chart or Circle Chart