A quadrilateral having all the angles equal to 90∘ is a ___
Square
Tripezium
Parallelogram
Pentagon
If each angle of a quadrilateral is 90∘ then the quadrilateral is a rectangle.
Untill otherwise stated about the sides we must not consider it to be a square.
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 ____________.