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Author:
chen mingchuan
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
三位數除以一位數（二）
Discover Resources
龍騰4_1-1課隨1
Quiz on Solving Right Triangles (Finding Angles) 解直角三角形：測驗2（求角度）
Measuring Volume 1
gjh-g03-01 和的平方公式
Q3-12
Discover Topics
Differential Equation
Fractions
Standard Deviation
Dilation
Congruence