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周长相等，正方形，长方形和正三角形，圆面积大小比较
Author:
冯圣军
Topic:
Square
,
Triangles
GeoGebra
New Resources
判斷球體
兩位數加法
【案例】2018年全国1卷理科12题
四邊形的特性
直角坐標平面上的旋轉變換
Discover Resources
傅立葉級數 (2)
餘弦定理的圖形證明
Simple Interest and Compound Interest
Copy of 劉徽的「割圓術」
少了一個質數One less prime number
Discover Topics
Hyperbola
Volume
Step Functions
Expected Value
Arithmetic