The quadrilateral have pairs of opposite sides parallel . So, it is a parallelogram.
The quadrilateral is a parallelogram with both pairs of opposite sides parallel.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")