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斜率
Author:
yen
GeoGebra
New Resources
兩位數加法
拼砌四邊形
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
兩位數除以一位數（一）
Discover Resources
分數除法5: x ÷ a/b (包含)
周界-平移法(練習一)
Parallel lines
夜市麻將模擬機
畫三角形 題1a 的複本
Discover Topics
Straight Lines
Diagrams
Integral Calculus
Area
Quadrilaterals