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几何模版：倍长中线
Author:
树常青
GeoGebra
New Resources
第八周作业
近似值：有效數字
直角坐標平面上的旋轉變換
sanjiaohanshu
拼砌四邊形
Discover Resources
分割
三角形三邊上各一點最小周長
perimeter
操場
鏡射的副本
Discover Topics
Rhombus
Isosceles Triangles
Polygons
Fractions
Exponent