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三角四星
Author:
吳秉沂
GeoGebra
New Resources
異分母分數減法
四邉形 (四年級) 教師版
三位數除以一位數（二）
【案例】2013年安徽高考15题
兩位數加法
Discover Resources
Angles in the Circumference and the Centre
fold and unflod the cone with geogebra5.0
Venn diagram
Magnitude of cosine
拉格朗日插值多項式
Discover Topics
Pie Chart or Circle Chart
Differential Calculus
Cosine
Distributions
Rectangle