In the above figure, the sides and have the same length, appearances to the contrary.
In the related illusion illustrated above, the interior lines appear to be of different lengths, despite the fact that they are the same (Wells 1991).
In the above figure, the sides and have the same length, appearances to the contrary.
In the related illusion illustrated above, the interior lines appear to be of different lengths, despite the fact that they are the same (Wells 1991).
Weisstein, Eric W. "Parallelogram Illusion." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ParallelogramIllusion.html