Question

What are scale drawings? Can you give an example?

Answer 1

@texaschic101

Answer 2

@Michele_Laino

Answer 3

http://static.prometheanplanet.com/images/resources/resource-thumbnails/thumb-nalg1-04-02-0003-diagram-thumb-lg-png.png

Answer 4

in your own words please :)
and i need the example in words

Answer 5

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

Answer 6

Awesome.. can you give me another example?

Answer 7

another example are drawings used in order to design a mechanical construction, namely boats, race cars, planes, and so on

Answer 8

can you give me like a word problem example please :)

Answer 9

namely?

Answer 10

no just like a regular word problem

Answer 11

sorry, what is a regular word problem?

Answer 12

just give me another example.. but as a word problem .. it doesnt matter what type @Michele_Laino

Answer 13

another example comes from drawings used to design architectural constructions

Answer 14

thats not a word problem @Michele_Laino

Answer 15

I'm sorry, I don't know what is a word problem

Answer 16

like this for example..
if the distance on a map is 2 cm represents 50 meters , what is the scale factor?

Answer 17

In that case, the scale factor is:
\(2\) cm corresponds to \(50\) meters, or \(1:25\)

Answer 18

ok now can you give me an example like that

Answer 19

another example, is from boats constructions:
600 millimeters represents a distance of 3 meters
so the scale factor is: \(200:1\)

Answer 20

ok thanks.. next question :)

What are vertical angles? can you give an example?

Answer 21

in words please :)

Answer 22

please wait a moment

Answer 23

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:

Answer 24

how do i explain that example to my teacher in words?

Answer 25

in that example we have considered the vertical angles which come from the intersection between two infinite coplanar and incident lines

Answer 26

ok thanks :)

Answer 27

:)

Answer 28

next!

Answer 29

can you find the area and circumfrance of a circcle given the radius or diameter?

Answer 30

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

Answer 31

i dont understand

Answer 32

more explanation:
\[\begin{gathered}
A = \pi {r^2},\quad {\text{ or }}A = \pi \frac{{{D^2}}}{4} \hfill \\
C = 2\pi r,\quad {\text{or }}C = \pi D \hfill \\
\end{gathered} \]

Answer 33

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

Answer 34

here is the explanation using words only:
area is given by the product of 3.14 by the square of radius

Answer 35

or by the product of 3.14 and the square of diameter divided by four

Answer 36

circumference is given by the product of 6.28 by the radius,
or is given by the product of 3.14 by the diameter

Answer 37

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.

Answer 38

correct!

Answer 39

why did you use 3.14 and 6.28?

Answer 40

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

Answer 41

the quotient between*

Answer 42

6.28 is 3.14*2=6.28

Answer 43

ok thanks :) next!

Answer 44

can you describe the difference between complementary and supplementary angles?

Answer 45

complementary angles are angles whose sum is congruent to a right angle.
here is an exmaple:

Supplementary angles are angles whose sum is congruent to a flat angle.
here is an example: