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砍价
Author:
jf.wang
GeoGebra
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三位數除以一位數（二）
兩組對邊相等的四邊形
判斷球體
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
Discover Resources
六年級
How to draw a pentagon with ruler and compasses?
夜市麻將模擬機
cos(π/n)cos(2π/n)cos(3π/n) ... cos(nπ/n) = ?
畫三角形 題1d 的複本
Discover Topics
Orthocenter
Logic
Constructions
LCM and GCD
Cone