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區域著色
Author:
Ching-Hui Chou
GeoGebra
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三位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
畫出對稱圖形
錐體建築師
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旋轉對稱
三角形的外心
If x^2 + x + k > 0 for any real value of x, what is k?
比較利益
基础知识
Discover Topics
Parallelogram
Rhombus
Linear Regression
Conic Sections
Intersection