1T H/VWO §4.2 Working with coordinates

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• Leerjaar 1

§4.2 Working with coordinates

In order to work your way easier through the paragraph,

there's 

+ some information and 

+ a few tasks for you!

1st Open your Notebook at the WORDLIST.

2nd Copy the following WORDS:

1.  to plot - tekenen        

2.  line - lijn 

3.  line segment - lijnstuk (=deel van een lijn)

4.  grid points - roosterpunten

5. the origin - de oorsprong (van het assenstelsel)

2nd portion of words:

6. lines that intersect - lijnen die elkaar snijden

7. point of intersection - snijpunt

8. to leave out - weglaten

9. a zigzag - een zigzag (in een grafiek)

10. to extend (a line) - langer maken

A zigzag is for ...

1. showing the height
2. showing the width
3. dancing the night away
4. leaving out a part of the axis

a zigzag:

The use of a line segment:

+ if you don't use a (big) part of the vertical axis ...

+  you may use the zigzag symbol as a replacement  

(vervanging) for that part.

+ in this way your graph does not get too big!

+ we only use it for the vertical axis

A line segment ...

1. has no beginning and no end
2. has a beginning
3. has an end
4. has a beginning and an end

a line segment has a begin and an end!

Intersecting straight lines ....

1. never meet
2. meet twice
3. meet once
4. Google meet

A few questions about coordinates of points follow.

Key in, in the next slide, the coordinates of point B!

Point B is: .....

1. (2, 1)
2. (4, 3)
3. (3, 4)
4. (1, 2)

Explanation:

First we write down 

+  the horizontal coordinate,

+  only then the vertical one.

So:             B(4, 3)

Point C is (..., ...)

How to get the right coordinates you'll see in the next slide!

Explanation:

Going from A to B:

 You go 3 grids to the right, 

you go up 1 grid.

Now we move from A to C: (it works the same from B to D!)

 You go only 2 grids to the right

and up            So the 2nd coordinate for C becomes:

                               2 +     =   2    

​3​​2​​

​3​​2​​

​3​​2​​

After all this ...

it's homework time!

DO:

+  §4.2  Working with coordinates

+  Correct your work with the Solutionsbook and

+ Make pics of it and

+ Send them in in Google Classroom

+ I'm looking forward receiving some good work!