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动态专题—角度旋转
Author:
刘元平
GeoGebra
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近似值：有效數字
三位數除以一位數（一）
畫出對稱圖形
兩組對邊相等和有直角的四邊形
四邊形的特性
Discover Resources
waaachen
優良作品3(祥恩)
Comparing fractions using number lines and rectangles
gdss
带电粒子在匀强磁场中的运动
Discover Topics
Unit Circle
Constructions
Terms
Symmetry
Cone