A quadrilateral whose all four sides are equal and all four angles are equal to 90° is called .
A quadrilateral with all four sides equal, each angle not equal to 90∘ is called _________. Diagonals of such a quadrilateral intersect at an angle of ____________.
A quadrilateral with all four sides equal, each angle not equal to 90∘ is called _________. Diagonals of such a quadrilateral bisect each other at ____________.