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六上：圆的面积公式推导
Author:
钟秀群
Topic:
Circle
GeoGebra
New Resources
判斷球體
四邉形 (四年級) 教師版
兩位數加法
兩組對邊相等和有直角的四邊形
球體建築師
Discover Resources
Cactest
讀磅 (練習)
[S2] a revised version of Jane’s GeoGebra file (modified by the author)
Hoja de prueba
学习 CAS 计算器
Discover Topics
Poisson Distribution
Angles
Quadratic Functions
Frequency Distribution
Definite Integral