1. 
Calculate the area of the quadrilateral with the following points: (1, 0), (1, 5), (4, 5), (7, 4)


2. 
Calculate the area of the quadrilateral with the following points: (1, 1), (2, 6), (3, 6), (5, 4)


3. 
Calculate the area of the quadrilateral with the following points: (1, 4), (0, 7), (5, 10), (7, 7)


4. 
Calculate the area of the quadrilateral with the following points: (3, 1), (1, 2), (5, 1), (8, 2)


5. 
Calculate the area of the quadrilateral with the following points: (0, 1), (2, 2), (0, 4), (1, 5)


6. 
Calculate the area of the quadrilateral with the following points: (1, 2), (0, 7), (3, 8), (6, 0)


7. 
Calculate the area of the quadrilateral with the following points: (2, 4), (1, 1), (3, 0), (5, 8)


8. 
Calculate the area of the quadrilateral with the following points: (3, 3), (0, 8), (3, 8), (7, 3)


9. 
Calculate the area of the quadrilateral with the following points: (0, 1), (1, 1), (3, 1), (5, 5)


10. 
Calculate the area of the quadrilateral with the following points: (2, 3), (2, 2), (0, 0), (2, 2)


11. 
Calculate the area of the quadrilateral with the following points: (5, 3), (4, 1), (1, 4), (1, 3)


12. 
Calculate the area of the quadrilateral with the following points: (4, 4), (4, 1), (0, 2), (2, 5)

