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圓的外切圓
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
註：全華第三冊習題 1-1 進階題第 2 題 (107/09)
New Resources
sanjiaohanshu
兩組對邊相等的四邊形
異分母分數減法
兩位數除以一位數（二）
四邉形 (四年級) 教師版
Discover Resources
截面法體積(1)
等腰三角形內嵌矩形
正多面體
Quiz on Interest 利息：測驗
同旁內角---水平平行綫
Discover Topics
Rectangle
Addition
Cone
Step Functions
Differential Calculus