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同旁內角---垂直平行綫
Author:
chanfushun
GeoGebra
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【案例】2013年安徽高考15题
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
四邊形的特性
異分母分數減法
Discover Resources
Proof of Pythagoras Theorem
T4 Geobra
Measuring Volume 5
曲線
劉虹圻 內心
Discover Topics
Similar Triangles
Curve Sketching
Square
Interest Calculation
Isosceles Triangles