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上色練習
Author:
一路梁
GeoGebra
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畫出對稱圖形
三位數除以一位數（一）
直角坐標平面上的旋轉變換
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
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正三角形
兩圓及交弦
基础知识
三角形的概念
Strike and Dip 地層的走向與傾角的副本
Discover Topics
Means
Inequalities
Functions
Arithmetic Operations
Constructions