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andrea408

  • 2 years ago

geometry question please help !!!!!!! this is my last one

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  1. andrea408
    • 2 years ago
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    |dw:1360020584560:dw|

  2. karatechopper
    • 2 years ago
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    Ok, so if AD is the same as CD..what should AD be?

  3. andrea408
    • 2 years ago
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    4 ft?

  4. karatechopper
    • 2 years ago
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    Correct! Now do you know what the formula for finding the are of a triangle is?

  5. andrea408
    • 2 years ago
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    b * h?

  6. karatechopper
    • 2 years ago
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    Close! (B x H)1/2

  7. andrea408
    • 2 years ago
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    oh yea i forgot the half

  8. karatechopper
    • 2 years ago
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    :) Its ok Ok, so what do you think the base is?

  9. andrea408
    • 2 years ago
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    4 *4 ? or add ?

  10. karatechopper
    • 2 years ago
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    U are gonna add it..soo whats it gonna be?

  11. andrea408
    • 2 years ago
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    8

  12. karatechopper
    • 2 years ago
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    Good!

  13. karatechopper
    • 2 years ago
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    Now whats the height?

  14. andrea408
    • 2 years ago
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    7

  15. andrea408
    • 2 years ago
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    8*7?

  16. karatechopper
    • 2 years ago
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    Good..now put that in the formula

  17. karatechopper
    • 2 years ago
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    Yes!

  18. karatechopper
    • 2 years ago
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    But don't forget the 1/2 in the formula

  19. andrea408
    • 2 years ago
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    its 28 right ?

  20. karatechopper
    • 2 years ago
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    Yep!!! \[28 ft ^{2}\]

  21. andrea408
    • 2 years ago
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    thank you :)

  22. andrea408
    • 2 years ago
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    it said it was wrong ? :(

  23. karatechopper
    • 2 years ago
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    You're welcome! :)

  24. karatechopper
    • 2 years ago
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    What?!?

  25. andrea408
    • 2 years ago
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    yeah i dont know what went wrong

  26. karatechopper
    • 2 years ago
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    Oh..I see..

  27. karatechopper
    • 2 years ago
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    I know..

  28. karatechopper
    • 2 years ago
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    I hope this wasn't a quiz for a big grade right!?

  29. karatechopper
    • 2 years ago
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    Cuz, I see what went wrong..and I am really sorry!!

  30. andrea408
    • 2 years ago
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    well i have 5 questions to answer and i have to get a perfect score in order to go on my next lesson. its okay can you help me on my next one ?

  31. andrea408
    • 2 years ago
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    whats that?

  32. karatechopper
    • 2 years ago
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    Sure!

  33. karatechopper
    • 2 years ago
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    Lol nvm ahha

  34. karatechopper
    • 2 years ago
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    Just post your next question

  35. andrea408
    • 2 years ago
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    |dw:1360021622659:dw|

  36. andrea408
    • 2 years ago
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    Is it the same way you told me>?

  37. karatechopper
    • 2 years ago
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    Yup!

  38. andrea408
    • 2 years ago
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    |dw:1360021756423:dw|

  39. andrea408
    • 2 years ago
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    what is the area of this parallelogram

  40. karatechopper
    • 2 years ago
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    I think its just B x H

  41. andrea408
    • 2 years ago
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    so 6 + 4 ? 10 and times 20 ?

  42. karatechopper
    • 2 years ago
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    Oh wait..no..

  43. karatechopper
    • 2 years ago
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    Ok..you see how there this a small triangle in the parallelogram?

  44. andrea408
    • 2 years ago
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    yes

  45. karatechopper
    • 2 years ago
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    Ok. That A stands for Area. And that A is in the triangle. So its saying that the area of the triangle is 20. So we need to find the height of the triangle before trying to find the are of the paralellogram.

  46. karatechopper
    • 2 years ago
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    So..whats the base of the triangle?

  47. andrea408
    • 2 years ago
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    its 4 ft

  48. karatechopper
    • 2 years ago
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    Good. Now do you have any idea of how to find the height of the triangle?

  49. andrea408
    • 2 years ago
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    no i dont, how do you find it ?

  50. karatechopper
    • 2 years ago
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    Ok..well one way is that you can put the info you have in the area of a triangle formula and solve fore the height..it would look like this.. (4 x H)1/2=20 SOLVE IT! The 4 is for the Base..the 20 is for the area..

  51. andrea408
    • 2 years ago
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    how do you solve ?

  52. andrea408
    • 2 years ago
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    is it 10 ?

  53. andrea408
    • 2 years ago
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    wait its 125 !

  54. karatechopper
    • 2 years ago
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    The H is 10

  55. andrea408
    • 2 years ago
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    oh i was right the first time then

  56. karatechopper
    • 2 years ago
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    Yeh! Now that you know what the height is, you can now find the area of the parallelogram

  57. karatechopper
    • 2 years ago
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    Its going to be the basic formula B x H

  58. andrea408
    • 2 years ago
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    so 4* 10 ?

  59. karatechopper
    • 2 years ago
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    no..try again..

  60. andrea408
    • 2 years ago
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    10 times 10 ?

  61. karatechopper
    • 2 years ago
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    yes

  62. andrea408
    • 2 years ago
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    the answer is 100 !?

  63. andrea408
    • 2 years ago
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    |dw:1360023228622:dw|

  64. Directrix
    • 2 years ago
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    The area of a triangle is (1/2) its base length times its corresponding height. If the base is 4.5 and the height 4, then the Area is (1/2)*(4.5)*4 Area = ?

  65. andrea408
    • 2 years ago
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    the area would be 810 ?

  66. andrea408
    • 2 years ago
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    oh nvm its 9

  67. Directrix
    • 2 years ago
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    That is correct (9).

  68. andrea408
    • 2 years ago
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    no its wrong :(

  69. Directrix
    • 2 years ago
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    Then, please check the diagram. The base is marked 4.5 and the height 4. That would be 9 square miles. Check to see if the diagram is marked correctly. @andrea408

  70. andrea408
    • 2 years ago
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    |dw:1360024796872:dw|

  71. andrea408
    • 2 years ago
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    whats the area of this trapazoid ?

  72. Directrix
    • 2 years ago
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    The area of a rectangle is the product of the length and the width. The area of a triangle is (1/2)b * h. So, ... |dw:1360024949464:dw|

  73. Directrix
    • 2 years ago
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    Area of trapezoid is (1/2) * 6 * 14 + 13 * 14 A = ?

  74. andrea408
    • 2 years ago
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    is it 133?

  75. Directrix
    • 2 years ago
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    Try again --> (1/2) * 6 * 14 + 13 * 14 --------------- Do one-half of the product of 6 and 14. Add that answer to the product of 13 and 14 and post what you get.

  76. andrea408
    • 2 years ago
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    224 ?

  77. andrea408
    • 2 years ago
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    or 48?

  78. Directrix
    • 2 years ago
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    224 ? --> I agree.

  79. andrea408
    • 2 years ago
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    so the area of the trapazoid is 224 ?

  80. Directrix
    • 2 years ago
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    That is what I got.

  81. andrea408
    • 2 years ago
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    are you sure?

  82. Directrix
    • 2 years ago
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    What are the options?

  83. andrea408
    • 2 years ago
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    i dont have options . i just put in the answer and click done to see if its correct but im scared to click

  84. Directrix
    • 2 years ago
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    If the picture is correctly drawn and labeled, I am certain that the answer is 224 square feet.

  85. Directrix
    • 2 years ago
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    @andrea408

  86. andrea408
    • 2 years ago
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    |dw:1360025794352:dw|

  87. andrea408
    • 2 years ago
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    @needmathhelp7 can you help me please?

  88. needmathhelp7
    • 2 years ago
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    I'm so sorry, honey I wish I could, but I'm bad at this myself! Lol Good luck!! :) @andrea408 Try seeing @jim_thompson5910 @phi @JamesJ or @Luis_Rivera maybe they can help!

  89. andrea408
    • 2 years ago
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    ok thanks

  90. andrea408
    • 2 years ago
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    @jim_thompson5910 can you help me please?

  91. jim_thompson5910
    • 2 years ago
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    the base is 4.5, the height is 3 so the area is just base * height = 4.5 * 3 = 13.5 square miles

  92. jim_thompson5910
    • 2 years ago
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    In general Area of Parallelogram: A = B*H B = base H = height

  93. andrea408
    • 2 years ago
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    so the area of ABDF is just 13.5 ?

  94. jim_thompson5910
    • 2 years ago
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    yep 13.5 square miles

  95. andrea408
    • 2 years ago
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    are you sure?

  96. jim_thompson5910
    • 2 years ago
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    yes

  97. andrea408
    • 2 years ago
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    thank you !

  98. jim_thompson5910
    • 2 years ago
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    np

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