Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

eAnthonyR

The diagonals of a square each measure 7 feet. Find the are of the square

  • one year ago
  • one year ago

  • This Question is Closed
  1. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    @Loujoelou

    • one year ago
  2. ajprincess
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1345312296169:dw| Use pythagoras theorem \(a^2+a^2=7^2\) \(2a^2=49\) Area=\(a^2\) find \(a^2\) from \(2a^2=49\)

    • one year ago
  3. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    So 2a=49 and then divide both sides eright?

    • one year ago
  4. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    or just leave thats cool too lol

    • one year ago
  5. ajprincess
    Best Response
    You've already chosen the best response.
    Medals 0

    ya divide by 2 to find a^2

    • one year ago
  6. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    divide the diagonal by \(\sqrt{2}\) to get the length of the side, then square the result

    • one year ago
  7. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    ok gotchu Next question. Two sqaure are similar. The ratio of a set of sides is 2:4. whatis the ratio of their area?

    • one year ago
  8. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    if you call the diagonal \(d\) then the length of the side is \(\frac{d}{\sqrt{2}}\) and area is \(\frac{d^2}{2}\)

    • one year ago
  9. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    ok gotchu Next question. Two sqaure are similar. The ratio of a set of sides is 2:4. whatis the ratio of their area?

    • one year ago
  10. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1345313796722:dw| This is what the information gives us so far. It splits our square into 2 triangles and we can do pythageoren theorem what the sides are. A^2+B^2=7^2. is the formula for the pythageroen theorem. A^2+B^2=49. We simplified this here. They are both the same thing however because the sides of a square are equal so we really have 2A^2=49. We divide both sides by 2, and get A^2=24.5 Now we have to do the opposite of squaring, and that's square root. Now we have A^2= \[\sqrt{24.5} \] This is one side of the square, and we would do \[\sqrt{24.5}*\sqrt{24.5}\] to get our area of this square

    • one year ago
  11. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    Lol i got the answer xD thanks man :) Next question Two sqaure are similar. The ratio of a set of sides is 2:4. whatis the ratio of their area?

    • one year ago
  12. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1345314609037:dw| with the info. above, that's what we get and for the first square, let's find the area. Area= 2*2; Area=4. So that means for our 1st square we have an area of 4. Now we do the same for the 2nd square, we do Area= 4*4; Area=16. That means the area of both squares is 4 & 16. We put this into a ratio, and we have 4:16, which can be simplified to 1:4 if needed.

    • one year ago
  13. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    lol wow haha i wanted to make another question so i could give you another medal haha

    • one year ago
  14. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    Lol medals don't really matter that much to me. :) I enjoy helping others a lot more :D

    • one year ago
  15. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    hah ok so we will stay here <3

    • one year ago
  16. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    @Loujoelou

    • one year ago
  17. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    sure no prob. :)

    • one year ago
  18. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    There you goo @Loujoelou

    • one year ago
    1 Attachment
  19. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    if your yhere haha

    • one year ago
  20. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    I'm still here. :) Give me a bit of time to solve :D

    • one year ago
  21. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    ok :)

    • one year ago
  22. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    K. so yeah that's the square and you labelled it corretly :). We would do the same thing as we would with regular numbers, and we will multiply (2x+10)(4), and that would give us 8x+40=80. Do you know how to do the rest? :)

    • one year ago
  23. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    8x+40=80 -40 -40 8x=40 x=5<3

    • one year ago
  24. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    am i right?

    • one year ago
  25. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    Yep good job!! :)

    • one year ago
  26. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    and if you wanted to double check this problem, you would put x back into the probolv e. 5 and solve. (2(5)+10)=20, and 20*4=80 so this would be correct :)

    • one year ago
  27. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    problem as*

    • one year ago
  28. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    iight hold on i have to right the next one again <3

    • one year ago
  29. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    K and hey you got nice handwriting.

    • one year ago
  30. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    haha ik all the girls love it <3

    • one year ago
  31. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    • one year ago
    1 Attachment
  32. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    K :) All you would do here, is find the area of the bigger rectangle first. 200*140=28000. Now we find the area of the pool. 30*15=450. Finally all we do is subtract them, 28000-450=answer ft.^2

    • one year ago
  33. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    Thank you soo Much <3

    • one year ago
  34. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    Let me plug in the answers into my hw brb give me a minute

    • one year ago
  35. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    No prob. :) and okay :)

    • one year ago
  36. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    So the answer is 27,550ft^2?

    • one year ago
  37. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    Yeah :)

    • one year ago
  38. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    Thank you :) hold on i have to look for another Hw page

    • one year ago
  39. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    do you do virtual school o.O?

    • one year ago
  40. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    yes hahah

    • one year ago
  41. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    Find the area of a rhombus with diagonals of 4ft and 5ft . :) But im done wit virtual school im doing hw now

    • one year ago
  42. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    @Loujoelou

    • one year ago
  43. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    Oh okay I do some virtual school as well :)

    • one year ago
  44. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    cools xD

    • one year ago
  45. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    Find the area of a rhombus with diagonals of 4ft and 5ft . :)

    • one year ago
  46. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    if ur there xD

    • one year ago
  47. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    K so all we do is D1*D2/2=Area. D1=Diagonal 1 & D2= Diagonal 2

    • one year ago
  48. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    4*5/2=your answer :)

    • one year ago
  49. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    so 4*5 =20/2=10 xD right?

    • one year ago
  50. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    Yep :)

    • one year ago
  51. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    Hahah Yeahhh xD Find the base of the parallelogram that has an area of 228meters squared and has a hheight of 12meters

    • one year ago
  52. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    BRB GIVE ME A COUPLE OF mINUTES OK <3

    • one year ago
  53. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    K :)

    • one year ago
  54. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    @eAnthonyR

    • one year ago
  55. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    YAYYYY xD ahah :p

    • one year ago
  56. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    Find the base of the parallelogram that has an area of 228meters squared and has a hheight of 12meters If you dont mind xD

    • one year ago
  57. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    K so the formula of a parallelogram is Area=Base*Height. From the info above, we got 228=b*12. Can you find the base now? :)

    • one year ago
  58. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    Divide right :)?

    • one year ago
  59. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    Yep. divide 12 on both sides and get b=228/12

    • one year ago
  60. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    Find the missing diagonal of the rhombus that has an area of 12 feet sqaures and one diagonal of 6ft. If you may can you explain this one to me so i can understand alittle bit

    • one year ago
  61. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    K. To find the area of a rhombus we do D1+D2/2=Area. The D1/2 are the diagonals. Using the info. we have we get 6+D2/2=12

    • one year ago
  62. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    So do we subtract 12-6? and then thats the D2?

    • one year ago
  63. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    No, here we multiply the 2 on both sides, so we get 6+D2=24. Then we subtract both sides by 6 and get D2=18 :)

    • one year ago
  64. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    No, here we multiply the 2 on both sides, so we get 6+D2=24. Then we subtract both sides by 6 and get D2=18 :)

    • one year ago
  65. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    Ohhhh we multiply? Ok ok

    • one year ago
  66. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    wait but 18 isnt an answer ..

    • one year ago
  67. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    Wait whoops yeah I made a mistake sry let me see.

    • one year ago
  68. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    lol ok <3 its ok xD

    • one year ago
  69. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    No wait if we double-check what we got, in the formula D1+D2/2=12 and put 6 & 18 in, 18+6/2=12;24/2=12;12=12 it's right.

    • one year ago
  70. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    thats weird cause 18 isnt an answer hold on maybe i made a mistake

    • one year ago
  71. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    What are the choices?

    • one year ago
  72. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    4 6 8 2

    • one year ago
  73. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    Nope i didnt make a mistake

    • one year ago
  74. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    I can't seem to find what I did wrong sry. :/ Try posting it as a question, other help you on that one.

    • one year ago
  75. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    i posted it xD

    • one year ago
  76. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    join it

    • one year ago
  77. Loujoelou
    Best Response
    You've already chosen the best response.
    Medals 1

    Then once we find out what that one is I can help you w/ another one okay?

    • one year ago
  78. eAnthonyR
    Best Response
    You've already chosen the best response.
    Medals 1

    okkk :)

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.