anonymous
  • anonymous
What are scale drawings? Can you give an example?
Mathematics
  • Stacey Warren - Expert brainly.com
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
@texaschic101
anonymous
  • anonymous
@Michele_Laino
anonymous
  • anonymous
http://static.prometheanplanet.com/images/resources/resource-thumbnails/thumb-nalg1-04-02-0003-diagram-thumb-lg-png.png

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anonymous
  • anonymous
in your own words please :) and i need the example in words
Michele_Laino
  • Michele_Laino
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
anonymous
  • anonymous
Awesome.. can you give me another example?
Michele_Laino
  • Michele_Laino
another example are drawings used in order to design a mechanical construction, namely boats, race cars, planes, and so on
anonymous
  • anonymous
can you give me like a word problem example please :)
Michele_Laino
  • Michele_Laino
namely?
anonymous
  • anonymous
no just like a regular word problem
Michele_Laino
  • Michele_Laino
sorry, what is a regular word problem?
anonymous
  • anonymous
just give me another example.. but as a word problem .. it doesnt matter what type @Michele_Laino
Michele_Laino
  • Michele_Laino
another example comes from drawings used to design architectural constructions
anonymous
  • anonymous
thats not a word problem @Michele_Laino
Michele_Laino
  • Michele_Laino
I'm sorry, I don't know what is a word problem
anonymous
  • anonymous
like this for example.. if the distance on a map is 2 cm represents 50 meters , what is the scale factor?
Michele_Laino
  • Michele_Laino
In that case, the scale factor is: \(2\) cm corresponds to \(50\) meters, or \(1:25\)
anonymous
  • anonymous
ok now can you give me an example like that
Michele_Laino
  • Michele_Laino
another example, is from boats constructions: 600 millimeters represents a distance of 3 meters so the scale factor is: \(200:1\)
anonymous
  • anonymous
ok thanks.. next question :) What are vertical angles? can you give an example?
anonymous
  • anonymous
in words please :)
Michele_Laino
  • Michele_Laino
please wait a moment
Michele_Laino
  • Michele_Laino
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|
anonymous
  • anonymous
how do i explain that example to my teacher in words?
Michele_Laino
  • Michele_Laino
in that example we have considered the vertical angles which come from the intersection between two infinite coplanar and incident lines
anonymous
  • anonymous
ok thanks :)
Michele_Laino
  • Michele_Laino
:)
anonymous
  • anonymous
next!
anonymous
  • anonymous
can you find the area and circumfrance of a circcle given the radius or diameter?
Michele_Laino
  • Michele_Laino
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
anonymous
  • anonymous
i dont understand
Michele_Laino
  • Michele_Laino
more explanation: \[\begin{gathered} A = \pi {r^2},\quad {\text{ or }}A = \pi \frac{{{D^2}}}{4} \hfill \\ C = 2\pi r,\quad {\text{or }}C = \pi D \hfill \\ \end{gathered} \]
anonymous
  • anonymous
but i dont get any of those things... how would you explain it to a teacher. please make it very simple :) @Michele_Laino
Michele_Laino
  • Michele_Laino
here is the explanation using words only: area is given by the product of 3.14 by the square of radius
Michele_Laino
  • Michele_Laino
or by the product of 3.14 and the square of diameter divided by four
Michele_Laino
  • Michele_Laino
circumference is given by the product of 6.28 by the radius, or is given by the product of 3.14 by the diameter
anonymous
  • anonymous
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.
Michele_Laino
  • Michele_Laino
correct!
anonymous
  • anonymous
why did you use 3.14 and 6.28?
Michele_Laino
  • Michele_Laino
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
Michele_Laino
  • Michele_Laino
the quotient between*
Michele_Laino
  • Michele_Laino
6.28 is 3.14*2=6.28
anonymous
  • anonymous
ok thanks :) next!
anonymous
  • anonymous
can you describe the difference between complementary and supplementary angles?
Michele_Laino
  • Michele_Laino
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|
Michele_Laino
  • Michele_Laino
I meant AOB is a right angle* in the first picture
anonymous
  • anonymous
next! :)
anonymous
  • anonymous
can you discuss the differences between circumfrance and area of a circle?
Michele_Laino
  • Michele_Laino
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
anonymous
  • anonymous
ok next! @Michele_Laino
anonymous
  • anonymous
do you know what cross sections of a rectangular pryamid looks like? :)
Michele_Laino
  • Michele_Laino
if the cross section is made with a plane parallel to the base of that pyramid, then it is a rectangle
anonymous
  • anonymous
ok but can you describe what it would look like in words :)
Michele_Laino
  • Michele_Laino
|dw:1444062444548:dw|
anonymous
  • anonymous
ok thanks so much! please stay online because i have more questions for you :)
Michele_Laino
  • Michele_Laino
ok!:)

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