The rough sketch of the quadrilateral ABCD can be drawn as per the steps given below
(1) ∆ABC can be constructed by using the given measurements as follows.
(2) Vertex D is 6 cm away from vertex A.
Hence, while taking A as centre, draw an arc of radius 6 cm.
(3) Taking C as centre, draw an arc of radius 4 cm, cutting the previous arc at point D. Joint D to A and C.
ABCD is the required quadrilateral.