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救生員區域
Author:
張丰耘
GeoGebra
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三位數除以一位數（一）
兩位數加法
画直线等分三角形的面积
四邊形的特性
【案例】2013年安徽高考15题
Discover Resources
相似圖形基本概念
對稱求最小
Quiz on Naming of Congruent & Similar Triangles 全等及相似三角形的命名：測驗
How to draw a decagon with ruler and compasses?
Area
Discover Topics
Multiplication
Scalene Triangles
Geometry
Cosine
Prism