Kenneth S. answered 02/09/18
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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
"What is" it that you describe? A rhombus! (A rhombus has perpendicular DIAGONALS, of course, and it is not clear whether that is allowed by the "no perpendicular lines" clause.)
In future, try to write in the form of a question!