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正方形折纸减去两角
Author:
孟宝兴
GeoGebra
New Resources
找出對稱軸
兩組對邊相等的四邊形
球体的体积推导（优化版）
兩位數除以一位數（一）
判斷球體
Discover Resources
Spotlight 探射燈
雨刷中的數學
反演(Inversion)
HW3.NationalFlag
拋物線5-包絡線法
Discover Topics
LCM and GCD
Tree Diagrams
Equilateral Triangles
Histogram
Hypothesis Testing