Mathematics
Answer
Steps of construction :
Draw a line segment AB = 4.6 cm.
Through A, draw AP such that ∠A = 90°.
With B as center and radius 6.4 cm draw an arc cutting AP at D. Join AD and BD.
With D and A as centers and radii 4.2 cm and 6.0 cm respectively, draw arcs cutting each other at C.
Join DC, BC and AC.

Hence, ABCD is the required quadrilateral.