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anonymous

  • one year ago

will fan and medal what will be the perimeter and area of the rectangle below if its enlarged by using a scale factor of 5.5

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  1. anonymous
    • one year ago
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    | options are perimeter = 50 cm, area =155.5 cm2 perimeter = 50 cm, area =1,452 cm2 perimeter = 154 cm, area = 155.25 cm2 perimeter = 154 cm, area = 1,452 cm2

  2. anonymous
    • one year ago
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    |dw:1437068962331:dw|

  3. anonymous
    • one year ago
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    Can you tell me the formula for Area of Rectangle?

  4. anonymous
    • one year ago
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    You have been given Length = 8 cm and Width = 6 cm.. I want to know if you know the formula to find Area of a Rectangle or not?

  5. anonymous
    • one year ago
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    I don't

  6. anonymous
    • one year ago
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    And please, if you don't know anything I am asking, then say frankly and boldly that you don't know, I am here to make you know everything.. Don't worry about that.. Now, let us have some interaction so that we can both solve it properly and can understand it..

  7. anonymous
    • one year ago
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    Okay, I tell you, suppose we have a rectangle with its length = l (el) cm and width = w cm..

  8. anonymous
    • one year ago
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    ok

  9. anonymous
    • one year ago
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    |dw:1437069539918:dw|

  10. anonymous
    • one year ago
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    So, now we need to find its Area, I tell you that Area of any rectangle is given by: Area = Length x Width.. Did you get this?

  11. anonymous
    • one year ago
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    yes

  12. anonymous
    • one year ago
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    So, the Rectangle that I have draw with l cm and w cm is having area of: \(Area = l \times w = lw \quad cm^2\)..

  13. anonymous
    • one year ago
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    Clear upto this? Any doubt?

  14. anonymous
    • one year ago
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    hm, when i multiply the actual length by the width of my rectangle i come up with 48. Is that how I am supposed to do this?

  15. anonymous
    • one year ago
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    I am just telling your the basic formulae that we need to solve your original problem..

  16. anonymous
    • one year ago
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    yes, okay.

  17. anonymous
    • one year ago
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    Yes, Area = 48 cm^2, but that is just one part, we have a lot many parts to do..

  18. anonymous
    • one year ago
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    alright

  19. anonymous
    • one year ago
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    Just leave this step for a while, now we come to Perimeter...

  20. anonymous
    • one year ago
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    What is Perimeter?? It is sum of all the side lengths a rectangle has...

  21. anonymous
    • one year ago
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    right.

  22. anonymous
    • one year ago
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    |dw:1437070036436:dw|

  23. anonymous
    • one year ago
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    A rectangle has two length sides and two width sides, yes or no?

  24. anonymous
    • one year ago
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    yes*

  25. anonymous
    • one year ago
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    I thought you went on speaking Japanese while learning rectangles. :P

  26. anonymous
    • one year ago
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    xD

  27. anonymous
    • one year ago
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    Okay, so add all the side lengths.. \(Perimeter = l + l + w + w = 2 l + 2w \)

  28. anonymous
    • one year ago
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    All good till here?

  29. anonymous
    • one year ago
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    I don't understand the answer. I understand that we are going to be adding the lengths and widths together but what does that end result mean?

  30. anonymous
    • one year ago
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    Nothing.. We are just adding all the lengths and widths we have.. Now, you try adding all sides of your original question..

  31. anonymous
    • one year ago
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    I got 28

  32. anonymous
    • one year ago
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    That is good.. Now this is exactly you are half way done..

  33. anonymous
    • one year ago
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    Now, read your question last line or last few words, if your rectangle is ENLARGED BY SCALE FACTOR OF 5.5, Right?

  34. anonymous
    • one year ago
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    right.

  35. anonymous
    • one year ago
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    It means now your length and width both have been increased by 5.5 cm thereby enlarging it.. Getting this point?

  36. anonymous
    • one year ago
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    yes

  37. anonymous
    • one year ago
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    So, 8 has now become (8+5.5 = 13.5) and width has now become (6+5.5 = 11.5).. All good?

  38. anonymous
    • one year ago
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    yeah, so I will add 13.5 + 13.5 + 11.5 +11.5 , correct?

  39. anonymous
    • one year ago
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    So, now your rectangle becomes : |dw:1437070820960:dw|

  40. anonymous
    • one year ago
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    Good yaar, you are faster than light now.. :) Yes add them to get your new Perimeter that you need to find..

  41. anonymous
    • one year ago
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    50

  42. anonymous
    • one year ago
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    So C and D options are cancelled out.. Now find Area as you did earlier..

  43. anonymous
    • one year ago
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    Area buddy..

  44. anonymous
    • one year ago
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    Area = Length x Width... Just put the values in..

  45. anonymous
    • one year ago
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    155.25

  46. anonymous
    • one year ago
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    Any mistake have you done?

  47. anonymous
    • one year ago
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    155.25 cm2 , I believe that's correct.

  48. anonymous
    • one year ago
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    No, it is all right.. Good, is your option B right??

  49. anonymous
    • one year ago
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    No, it was A

  50. anonymous
    • one year ago
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    Sorry, I mean check values in option A again..

  51. anonymous
    • one year ago
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    Area there is 155.5 or 155.25, have you missed 2 there? I think yes, because your option C has 155.25, you must be missing 2 there..

  52. anonymous
    • one year ago
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    Both c and a have 155.25 as an option.

  53. anonymous
    • one year ago
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    That is good.. So, you go with A here , right??

  54. anonymous
    • one year ago
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    yes

  55. anonymous
    • one year ago
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    Okay, good but just go with A and then leave it, don't marry it and take to your home.. :P

  56. anonymous
    • one year ago
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    alright xD , thanks for the help.

  57. anonymous
    • one year ago
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    Any doubt anywhere??

  58. anonymous
    • one year ago
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    nope

  59. anonymous
    • one year ago
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    To summarize the formulae: \(1. \quad Area = Length \times Width\) \(2. \quad Perimeter = 2(Length + Width)\) In case of Rectangle only.. :)

  60. anonymous
    • one year ago
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    thank you so much I suck at math. Fanned you! :D

  61. anonymous
    • one year ago
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    Fanning someone does not cost you not I actually need to get fanned.. :)

  62. anonymous
    • one year ago
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    \(\dagger\)

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