A rough sketch of this quadrilateral can be drawn as follows.
(1) GDL can be constructed by using the given measurements as follows.
(2) Vertex O is 10 cm away from vertex D and 7.5 cm away from vertex L. Therefore, while taking D and L as centres, draw arcs of 10 cm radius and 7.5 cm radius respectively. These will intersect each other at point O.
(3) Join O to G and L.
GOLD is the required quadrilateral.
