Your test suite just checks whether a quadrilateral has equal sides, but that's not enough to form a square: rhombuses also have equal sides. Therefore, the test suite should also check a solution's angles.
PS: A test case filled with rhombuses and a single square on the curve would be instructional too.
Back to basics 11 - Max Integer
Return the first and last characters of a character array
Put two time series onto the same time basis
Map all the indices of an Array Indices into a Vector giving Index vs Row and Column
Pi Estimate 1
Is this group simply connected?
Repopulate the City
The 17x17 Problem
Placing Beads Neatly in a Box
Convert hex color specification to MATLAB RGB
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