Item 2
Find the surface area of the pyramid. The side lengths of the base are equal.

9 x 12 x 1/2 x 2 = (two area's of triangles on the sides) = 108

12 x 9 x 1/2 = (base triangle's area) 54

12 x 9 x 1/2 = (area of triangle behind) 54

Add given areas:

54 + 54 + 108 = 216 ft^2 I THINK.

Im really unsure about this.. please wait for more responses I REALLY am not sure about this answer.

1. 3.4/4

2. 0.8/7

3. 0.5 x 3

4. 0.9 x 6

5. 10.8

6. 2.35

7. 0.567

8. 9.35

9. 0.02

10. 0.06

11. 0.16

12. 0.42

13. 0.63

14. 5.6

15. 8.1

16. 9.9

17. 0.28

18. 0.48

19. 0.27

20. 0.49

21. 0.45

22. 0.72

23. 0.9

24. 0.88

25. 0.75

26. 0.16

27. 0.328

28. 0.495

29. 0.72

30. 1.068