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anonymous

  • one year ago

What are scale drawings? Can you give an example?

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  1. anonymous
    • one year ago
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    @texaschic101

  2. anonymous
    • one year ago
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    @Michele_Laino

  3. anonymous
    • one year ago
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    in your own words please :) and i need the example in words

  4. Michele_Laino
    • one year ago
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    scale drawings are drawings which refer to real objects, nevertheless their measures are reduced with respect to the corresponding real measures according to a scale factor. An example are the geographical maps

  5. anonymous
    • one year ago
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    Awesome.. can you give me another example?

  6. Michele_Laino
    • one year ago
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    another example are drawings used in order to design a mechanical construction, namely boats, race cars, planes, and so on

  7. anonymous
    • one year ago
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    can you give me like a word problem example please :)

  8. Michele_Laino
    • one year ago
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    namely?

  9. anonymous
    • one year ago
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    no just like a regular word problem

  10. Michele_Laino
    • one year ago
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    sorry, what is a regular word problem?

  11. anonymous
    • one year ago
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    just give me another example.. but as a word problem .. it doesnt matter what type @Michele_Laino

  12. Michele_Laino
    • one year ago
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    another example comes from drawings used to design architectural constructions

  13. anonymous
    • one year ago
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    thats not a word problem @Michele_Laino

  14. Michele_Laino
    • one year ago
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    I'm sorry, I don't know what is a word problem

  15. anonymous
    • one year ago
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    like this for example.. if the distance on a map is 2 cm represents 50 meters , what is the scale factor?

  16. Michele_Laino
    • one year ago
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    In that case, the scale factor is: \(2\) cm corresponds to \(50\) meters, or \(1:25\)

  17. anonymous
    • one year ago
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    ok now can you give me an example like that

  18. Michele_Laino
    • one year ago
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    another example, is from boats constructions: 600 millimeters represents a distance of 3 meters so the scale factor is: \(200:1\)

  19. anonymous
    • one year ago
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    ok thanks.. next question :) What are vertical angles? can you give an example?

  20. anonymous
    • one year ago
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    in words please :)

  21. Michele_Laino
    • one year ago
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    please wait a moment

  22. Michele_Laino
    • one year ago
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    vertical angles is a couple of angles in which the sides of an angle are the prolongations of the sides of the other angle of the couple. Here is an example: |dw:1444060498908:dw|

  23. anonymous
    • one year ago
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    how do i explain that example to my teacher in words?

  24. Michele_Laino
    • one year ago
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    in that example we have considered the vertical angles which come from the intersection between two infinite coplanar and incident lines

  25. anonymous
    • one year ago
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    ok thanks :)

  26. Michele_Laino
    • one year ago
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    :)

  27. anonymous
    • one year ago
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    next!

  28. anonymous
    • one year ago
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    can you find the area and circumfrance of a circcle given the radius or diameter?

  29. Michele_Laino
    • one year ago
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    it is simple, if \(r\) is the radius and \(D\) is the diameter, then we can write this: \[\begin{gathered} A = \pi {r^2} = \pi \frac{{{D^2}}}{4} \hfill \\ C = 2\pi r = \pi D \hfill \\ \end{gathered} \] \(A\) stands for area, and \(C\) stand for circumference length

  30. anonymous
    • one year ago
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    i dont understand

  31. Michele_Laino
    • one year ago
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    more explanation: \[\begin{gathered} A = \pi {r^2},\quad {\text{ or }}A = \pi \frac{{{D^2}}}{4} \hfill \\ C = 2\pi r,\quad {\text{or }}C = \pi D \hfill \\ \end{gathered} \]

  32. anonymous
    • one year ago
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    but i dont get any of those things... how would you explain it to a teacher. please make it very simple :) @Michele_Laino

  33. Michele_Laino
    • one year ago
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    here is the explanation using words only: area is given by the product of 3.14 by the square of radius

  34. Michele_Laino
    • one year ago
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    or by the product of 3.14 and the square of diameter divided by four

  35. Michele_Laino
    • one year ago
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    circumference is given by the product of 6.28 by the radius, or is given by the product of 3.14 by the diameter

  36. anonymous
    • one year ago
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    okay.. so is this the answer? area is given by the product of 3.14 by the square of radius or by the product of 3.14 and the square of diameter divided by four. circumference is given by the product of 6.28 by the radius, or is given by the product of 3.14 by the diameter.

  37. Michele_Laino
    • one year ago
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    correct!

  38. anonymous
    • one year ago
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    why did you use 3.14 and 6.28?

  39. Michele_Laino
    • one year ago
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    since, the quotient by the length of a circumference and the diameter of that circumference is an irrational number, namely: 3.14159....(infinite decimal figures) which can be approximated to 3.14

  40. Michele_Laino
    • one year ago
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    the quotient between*

  41. Michele_Laino
    • one year ago
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    6.28 is 3.14*2=6.28

  42. anonymous
    • one year ago
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    ok thanks :) next!

  43. anonymous
    • one year ago
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    can you describe the difference between complementary and supplementary angles?

  44. Michele_Laino
    • one year ago
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    complementary angles are angles whose sum is congruent to a right angle. here is an exmaple: |dw:1444061870759:dw| Supplementary angles are angles whose sum is congruent to a flat angle. here is an example: |dw:1444061943310:dw|

  45. Michele_Laino
    • one year ago
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    I meant AOB is a right angle* in the first picture

  46. anonymous
    • one year ago
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    next! :)

  47. anonymous
    • one year ago
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    can you discuss the differences between circumfrance and area of a circle?

  48. Michele_Laino
    • one year ago
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    area of a circle is the measure of the extension of that circle, whereas the circumference of a circle is the measure of the contour of that circle

  49. anonymous
    • one year ago
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    ok next! @Michele_Laino

  50. anonymous
    • one year ago
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    do you know what cross sections of a rectangular pryamid looks like? :)

  51. Michele_Laino
    • one year ago
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    if the cross section is made with a plane parallel to the base of that pyramid, then it is a rectangle

  52. anonymous
    • one year ago
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    ok but can you describe what it would look like in words :)

  53. Michele_Laino
    • one year ago
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    |dw:1444062444548:dw|

  54. anonymous
    • one year ago
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    ok thanks so much! please stay online because i have more questions for you :)

  55. Michele_Laino
    • one year ago
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    ok!:)

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