1TH/Vwo §6.3 Scale

§6.3 Scale
Celebrating your birthday, inviting 300 people,
is something done ON A LARGE SCALE.
However, nowadays that's not such a good idea ...
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WiskundeMiddelbare schoolhavo, vwoLeerjaar 1

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§6.3 Scale
Celebrating your birthday, inviting 300 people,
is something done ON A LARGE SCALE.
However, nowadays that's not such a good idea ...

Slide 1 - Diapositive

Calculations on Scale can be a little difficult...

Slide 2 - Diapositive

That's why we do this LessonUp,
before you do §6.3 yourself!

Slide 3 - Diapositive

Vital question for 'scale':
What does 1 cm in the drawing represent in reality?!
This drawing could be a map of a town, a country or a 
continent,
but also the drawing of a person, an animal, or whatever.   
Let's look at a few examples!

Slide 4 - Diapositive

Slide 5 - Diapositive

Slide 6 - Diapositive

Example of 'scale':

Slide 7 - Diapositive

Vital question for 'scale':
What does 1 cm in the drawing represent in reality?!
This drawing could be a map of a town, 
but also the drawing of an animal, or whatever.   
Let's look at an example!

Slide 8 - Diapositive

Slide 9 - Diapositive

What is the right scale for the drawing of the weasel?
A
1 : 7.5
B
15 : 1
C
1 : 15
D
30 : 2

Slide 10 - Quiz

Slide 11 - Diapositive

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Up to now ...
The objects (thingies) were drawn much smaller than they are in real life. However, this is gonna change!
Fleas (vlooien) or ticks (teken) are shown
on TV or in a book much greater than they
really are. In that way we can see what they look like!

Slide 16 - Diapositive

Slide 17 - Diapositive


A
2 : 8
B
4 : 1
C
1 : 4
D
0.5 : 2

Slide 18 - Quiz

So the scale is     4 : 1  ??!
Shouldn't this result be:
1 : 4 ?
No, watch the next slide!

Slide 19 - Diapositive

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Slide 21 - Diapositive

Homework time
+ Do §6.3 Scale now.
+ Good luck.

Slide 22 - Diapositive