Yes if the 4 sided quadrilateral is in the form of a square or a rectangle but in other quadrlaterals the angles are of various sizes although in both cases the 4 interior angles add up to 360 degrees.
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All sides equal but not all angles.
A rhombus is a quadrilateral with 4 equal sides and if the angles are also all equal that that rhombus is a square.
In general, a quadrilateral is not regular. Only the square has all its sides equal AND all its angles equal and so can be called regular.
It is a parallelogramIf one of the angles is a right angle (then they all are) and the quadrilateral is a rectangle.If both pairs of sides are equal in length (but none of the angles is a right angle) the quadrilateral is a rhombus.If the sides are equal and one of the angles is a right angle, the quadrilateral is a square.
It's impossible for a quadrilateral to have no equal sides and have right angles.