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正方形折纸减去两角
Author:
孟宝兴
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
拼砌四邊形
四邉形 (四年級) 教師版
三位數除以一位數（一）
球体的体积推导（优化版）
Discover Resources
Probability(概率）
數值滑桿
動圓定圓兩圓內切動圓圓心軌跡
Copy of 固定周界的長方形的面積變化
作業1
Discover Topics
Pythagoras or Pythagorean Theorem
Multiplication
Piecewise Functions
Geometric Distribution
Coordinates