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anonymous

  • 5 years ago

if the sides of a square are lengthened by 8cm, the area becomes 169cm^2. Find the length of a side of the original square. The length of a side of the original square is ..... cm?

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  1. anonymous
    • 5 years ago
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    169 is the square of 13

  2. anonymous
    • 5 years ago
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    13-8=5

  3. anonymous
    • 5 years ago
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    i didnt really understand the whole cm^2 thing to figure it out

  4. anonymous
    • 5 years ago
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    that just means area. area is given in terms of square units

  5. anonymous
    • 5 years ago
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    i say don't worry about it

  6. anonymous
    • 5 years ago
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    you wouldn't say the area of a table top is 10 feet. that is a linear measure. you could say it is 10 square feet

  7. anonymous
    • 5 years ago
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    the ^2 pertains the the letters, not the numbers

  8. anonymous
    • 5 years ago
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    yeah what ecin said

  9. anonymous
    • 5 years ago
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    follow this, Let x be the original side A=169 A=s^2 169=(x+8)^2, we can extract the square root of both sides 13=x+8 x=13-8 x=5 cm , this is the original side

  10. anonymous
    • 5 years ago
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    so u would say for 169cm^2 , 169 square feet. so u just squared the 169? then - from 8

  11. anonymous
    • 5 years ago
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    satellite wait till she got to volume

  12. anonymous
    • 5 years ago
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    cubic units

  13. anonymous
    • 5 years ago
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    if you had something that's 16 sq ft and it is square in shape

  14. anonymous
    • 5 years ago
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    no, square root of 169 is 13.

  15. anonymous
    • 5 years ago
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    then each side would be 4, .. and the area is 4^2

  16. anonymous
    • 5 years ago
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    actually i did not square the 169. i thought of a number whose square is 169

  17. anonymous
    • 5 years ago
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    sry pat that is what I meant not square feet

  18. anonymous
    • 5 years ago
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    in other words \[\sqrt{169}=13\]

  19. anonymous
    • 5 years ago
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    yeah, but that is having the same concept

  20. anonymous
    • 5 years ago
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    but that's only the case of a truly square shape, for now you should just ignore the sq units and just put it on the answer as a definition

  21. anonymous
    • 5 years ago
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    it is okay...

  22. anonymous
    • 5 years ago
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    l*w= A * some^2 unit

  23. anonymous
    • 5 years ago
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    yeah well i hope to not take anymore math after this class, keeps me stresses grrrr..lol

  24. anonymous
    • 5 years ago
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    quit while you are ahead!

  25. anonymous
    • 5 years ago
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    a cm * b cm = a* b cm^2, not cm^2 will always be there, so take it as a definition

  26. anonymous
    • 5 years ago
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    in my case, i do pay attention because its' not always the same. I'm in engineering

  27. anonymous
    • 5 years ago
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    just follow what i did awarr28

  28. anonymous
    • 5 years ago
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    oh ok ecin, at least I'm taking notes, but half the time I have to keep coming back to ask because i still cant figure it out...lol

  29. anonymous
    • 5 years ago
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    start with basic things, and things you can conceptualize

  30. anonymous
    • 5 years ago
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    yes I wrote that down pat, thank you all for all your help

  31. anonymous
    • 5 years ago
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    you are welcome^_^

  32. anonymous
    • 5 years ago
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    say you have tiled floors and they are all 1 feet

  33. anonymous
    • 5 years ago
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    or mess around with the little squares in graph papers think about them as square feets

  34. anonymous
    • 5 years ago
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    ok, I thank you all for your help.

  35. anonymous
    • 5 years ago
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    1 feet by 2 feet = 2 squares

  36. anonymous
    • 5 years ago
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    its like you are shading every little box or tile you count

  37. anonymous
    • 5 years ago
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    oh ok I see what your saying

  38. anonymous
    • 5 years ago
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    2 feet by 3 feet are six boxes

  39. anonymous
    • 5 years ago
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    and that's the area

  40. anonymous
    • 5 years ago
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    dont' worry about why, but just put it at the end ft^2

  41. anonymous
    • 5 years ago
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    so 2 feet by 6 feet would be 12 boxes right?

  42. anonymous
    • 5 years ago
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    yea

  43. anonymous
    • 5 years ago
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    ;)

  44. anonymous
    • 5 years ago
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    you can also think about it like this "clear the area"

  45. anonymous
    • 5 years ago
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    you don't want nothing or nobody in that space

  46. anonymous
    • 5 years ago
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    a perimiter on the other hand is just like a gate.. is a measurement of the outside

  47. anonymous
    • 5 years ago
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    gotcha

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