## anonymous one year ago Please help. I really need help. This is soo confusing. Will fan and medal.

1. anonymous

2. anonymous

Use the formula for the area of the trapezoid.

3. anonymous

Okay?

4. anonymous

A=h$\frac{ b1+b2 }{ 2 }$

5. anonymous

What is the measurements for your trapezoid?

6. anonymous

a = base, b = base, and h = height

7. anonymous

I'll be right back. Tag me when you get the measurements!

8. anonymous

Length of the bases, and h is the height, to answer the question. How many square feet of grass are there on a trapezoid field with a height of 175ft and the bases of 125ft and 81ft

9. anonymous

@HistoryGeek18 ^^

10. anonymous

where A is area b1 and b2 ar the ^^length of the bases. (it's before that post.

11. anonymous

Alrighty your overall area equals A = 18,025.

12. anonymous

Do you have an idea of how I got that?

13. anonymous

Not entirely. That's why I'm confused.

14. anonymous

IS there anyway you can describe it?

15. anonymous

okay so, a is your "top base" or the top measure of your trapezoid so the smallest measurement for the bases is what you'll plug in for a base.

16. anonymous

as in a^1 = 81

17. anonymous

b^2 = 125

18. anonymous

because "b" is always the bottom of your trapezoid.

19. anonymous

Okay.

20. anonymous

So plug those into the equation for me.

21. anonymous

$\frac{ 81 }{ 125 }$ is this correct?

22. anonymous

No.

23. anonymous

a + b

24. anonymous

plug in base "a" and base "b"

25. anonymous

Then I'm confused.

26. anonymous

so 81+125?

27. anonymous

The equation for a trapezoid is a + b divided by 2 = h

28. anonymous

Yes! so now our equation looks like this: 81 + 125 _________ = h 2

29. anonymous

What do we plug in for h?

30. anonymous

so H=103?

31. anonymous

Where did you get 103?

32. anonymous

Wait. I'm doing something wrong.

33. anonymous

34. anonymous

oh okay.

35. anonymous

Your equation right now if you plugged in h = 175

36. anonymous

should look like this: 8 + 125 ________ = 175 2

37. anonymous

wait. 8 or 81?

38. anonymous

Sorry 81

39. anonymous

81 = a

40. anonymous

$\frac{ 81+ 125}{ 2} =h$

41. anonymous

Yes! Now, plug in for h = height

42. anonymous

no sorry 175?

43. anonymous

h = 175

44. anonymous

okay. oh wait. I just rechecked the equation. its 75 not 175. Does the equation still stay the same?

45. anonymous

Yes, so now we just want to plug in 75 for h instead of 175

46. anonymous

$\frac{ 81+125 }{ 2}=75$

47. anonymous

Yes!!!! Now, solve the fraction part of your equation first!

48. anonymous

66.5 * 75 = ?

49. anonymous

I already divided for you just solve that for me.

50. anonymous

oh okay. 4987.5?

51. anonymous

Oops I'm sorry

52. anonymous

Solve 103 * 75 = ?

53. anonymous

7725?

54. anonymous

Correct!

55. anonymous

So, A (area) = 7,725

56. anonymous

Okay. So is that it?

57. anonymous

Yes, let me show you the whole equation so you can use it next time.

58. anonymous

Okay thanks!

59. anonymous

A = a + b/2 * h = 81 + 125/2 * 75 = 7725

60. anonymous

There you are! Hope I helped you!

61. anonymous

You really helped thanks!

62. anonymous

Great! Tag me if you need anything else!