Square and Rectangle
The picture of the rectangle is deceptive!
The line XY shown in the picture of the rectangle (see below) is not a line at all.
The parts XU and VY have a gradient of 2 / 5 = 0.4, and the parts XV and UY have a gradient of 3 / 8 = 0.375.
In fact, XUYV is a parallelogram with an area of 1, not a line!
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