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5 squares
Author:
johnmayhk
GeoGebra
Purple points are mid-points of corresponding line segments. Drag blue points to change the size and orientation of squares. Are two red line segments perpendicular to each other always?
New Resources
异形操场
盈利與虧蝕
球体的截面
第三周作业效果演示
中华人民共和国国旗
Discover Resources
只跳升一次即下降的函數
生活中的平面圖形─點與線的性質
小青蛙
拼出三角形
三角形相似的直观显示.许兴华数学