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quadrilaterals 5
Author:
iedc
GeoGebra
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兩組對邊相等的四邊形
四邊形的特性
兩位數加法
三位數除以一位數（二）
【案例】2013年安徽高考15题
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Symmetric 設計對稱圖案(一條對稱軸)(垂直)
旋轉對稱
test
江苏省连云港市 2019中考 选择第7题
limit of function f(x)=x^2
Discover Topics
LCM and GCD
Right Triangles
Quadratic Equations
General Quadrilateral
Median Value