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八年级数学下册正方形
Author:
周胜华
Topic:
General Quadrilateral
,
Geometry
,
Square
GeoGebra
New Resources
球体的体积推导（优化版）
兩組對邊相等的四邊形
異分母分數減法
三位數除以一位數（二）
判斷球體
Discover Resources
弦的定理
鏡射
科展
三角形的心
任意正N边形在圆内滚动顶点的轨迹
Discover Topics
Cone
Rectangle
Triangles
Linear Regression
Function Graph