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Author:
Ricky Chan
GeoGebra
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四邊形的特性
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
畫出對稱圖形
第八周作业
Discover Resources
簡易文氏圖
习题，任意三点不在同一直线上的等四个点，最多能作出几个三角形
左右
angle between 2 planes 02
同旁內角---水平平行綫
Discover Topics
Rational Numbers
Scatter Plot
Perimeter
Arithmetic Mean
Optimization Problems