Constructing a Quadrilateral

We shall learn how to construct a unique quadrilateral by following methods :-
When four sides and one diagonal are given.
When two diagonals and three sides are given.
When two adjacent sides and three angles are given.
When three sides and two included angles are given.
When other special properties are known.
Initially it appears that only one measurements has been given. Actually we have many more details with us, because the figure is special quadrilateral namely a square. We know that each of its angles is a Right angle.
As we know the diagonals of Rhombus are Perpendicular bisectors of one another.
So, first we draw AC = 7 cm and construct its perpendicular bisector. Let them meet at O. cut off 3 cm lengths on either side of the drawn bisector . You get now B and D.