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梯形
Author:
Yip Chi Wai
Topic:
Trapezoid
GeoGebra
New Resources
三位數除以一位數（一）
四邉形 (四年級) 教師版
四邊形的特性
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
Discover Resources
加法
amoeba
Twist Bottle
百分數與分數
谢氏地毯
Discover Topics
Cone
Circle
Quadrilaterals
Natural Numbers
Hypergeometric Distribution