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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?
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【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
三位數除以一位數(一)
異分母分數減法
兩位數除以一位數(一)
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五上_面積(二)
旋轉矩陣
曲線與投影
y = sin(ωx)的圖像
绝对值加减的图像
滑杆的數字接力賽-平移旋轉三角形填滿四邊形(加邊框)
Discover Topics
Binomial Distribution
Vectors
Poisson Distribution
Incircle or Inscribed Circle
Real Numbers