Problem 46565. Find an inscribed square on a closed curve

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.

Test suite has been updated to check for a solution's angles as well and a mixed test case with rhombus and square mixed has been added.

Solutions have been rescored as well.