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三角形外角和=360⁰
Author:
李春培
三角形外角和=360⁰
GeoGebra
New Resources
找出對稱軸
第八周作业
四邊形的特性
兩組對邊相等的四邊形
三位數除以一位數（二）
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Life Examples of Quadratic Functions 生活中的二次函數
CalCulus
點之極線定理 / polar of a point theorem
sinα + sinβ > 0 ?
除法
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Right Triangles
Correlation
Calculus
Polygons
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