1. 
Find the area of the quadrilateral whose vertices are (10, 1), (6, 7), (7, 5), and (3, 4)


2. 
Find the area of the quadrilateral whose vertices are (19, 6), (13, 12), (7, 7), and (9, 1)


3. 
Find the area of the quadrilateral whose vertices are (1, 1), (4, 4), (2, 13), and (6, 7)


4. 
Find the area of the quadrilateral whose vertices are (2, 4), (0, 5), (4, 4), and (1, 9)


5. 
Find the area of the quadrilateral whose vertices are (0, 2), (2, 11), (10, 5), and (5, 1)


6. 
Find the area of the quadrilateral whose vertices are (6, 13), (3, 8), (3, 2), and (8, 7)


7. 
Find the area of the quadrilateral whose vertices are (6, 8), (10, 3), (5, 4), and (2, 4)


8. 
Find the area of the quadrilateral whose vertices are (0, 4), (5, 1), (9, 7), and (4, 11)


9. 
Find the area of the quadrilateral whose vertices are (1, 1), (3, 11), (8, 4), and (1, 8)


10. 
Find the area of the quadrilateral whose vertices are (2, 11), (8, 5), (5, 2), and (0, 3)


11. 
Find the area of the quadrilateral whose vertices are (9, 1), (6, 5), (12, 9), and (18, 3)


12. 
Find the area of the quadrilateral whose vertices are (7, 4), (10, 12), (13, 0), and (19, 4)


13. 
Find the area of the quadrilateral whose vertices are (11, 5), (6, 11), (3, 3), and (1, 6)


14. 
Find the area of the quadrilateral whose vertices are (5, 4), (10, 9), (2, 7), and (6, 14)


15. 
Find the area of the quadrilateral whose vertices are (0, 7), (4, 0), (6, 7), and (3, 12)


16. 
Find the area of the quadrilateral whose vertices are (9, 14), (9, 1), (14, 7), and (5, 7)


17. 
Find the area of the quadrilateral whose vertices are (12, 6), (8, 1), (4, 12), and (2, 4)


18. 
Find the area of the quadrilateral whose vertices are (12, 12), (15, 6), (9, 8), and (12, 1)

