# 1T H/VWO §3.2 Working with coordinates

§3.2 Working with coordinates
In order to work your way easier through the paragraph,
there's
+ some information and
+ a few tasks for you!
1 / 28
Slide 1: Tekstslide
WiskundeMiddelbare schoolhavo, vwoLeerjaar 1

In deze les zitten 28 slides, met interactieve quizzen, tekstslides en 1 video.

Lesduur is: 50 min

## Onderdelen in deze les

§3.2 Working with coordinates
In order to work your way easier through the paragraph,
there's
+ some information and
+ a few tasks for you!

#### Slide 1 -Tekstslide

DRAW with PENCIL(S) !!

#### Slide 4 -Tekstslide

Now OPEN your Notebook at the WORDLIST.
and 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)

#### Slide 5 -Tekstslide

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

#### Slide 6 -Tekstslide

A zigzag is for ...
A
showing the height
B
showing the width
C
dancing the night away
D
leaving out a part of the axis

a zigzag:

#### Slide 8 -Tekstslide

The use of a zigzag:
+ 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
+ and once upon a time in popmusic: 'The zig zag wanderer'. See next slide!

#### Slide 11 -Video

A line segment ...
A
has no beginning and no end
B
has a beginning
C
has an end
D
has a beginning and an end

#### Slide 12 -Quizvraag

a line segment has a beginning and an end!

#### Slide 13 -Tekstslide

Intersecting straight lines ....
A
never meet
B
meet twice
C
meet once
D

#### Slide 14 -Quizvraag

A few questions about coordinates of points follow.

#### Slide 15 -Tekstslide

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

#### Slide 16 -Tekstslide

Point B is: .....
A
(2, 1)
B
(4, 3)
C
(3, 4)
D
(1, 2)

#### Slide 17 -Quizvraag

Explanation:
First we write down
+  the horizontal coordinate,
+  only then the vertical one.
So:             B(4, 3)

#### Slide 19 -Tekstslide

Point C is (..., ...)
Answer this in the next slide.

A
(3, 2 1/2)
B
(2 1/2, 3)
C
(3, 2 2/3)
D
(2, 2 2/3)

#### Slide 21 -Quizvraag

Point C is (..., ...)
How to get the right coordinates you'll see in the next slide!

#### Slide 22 -Tekstslide

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
32
32
32

#### Slide 23 -Tekstslide

After all this ...
it's homework time!

#### Slide 24 -Tekstslide

1.   p.96 exercise 14b.  It says:
'You start at (4, 0)'.    Change this into:
'You start at (4, 20)' !
2.  p.97  exercise  C2a.  It says:
'H (12, 18)'.   Change this into:
'H (22, 18).     IN THE NEXT SLIDE I WILL SHOW THIS ONCE MORE!

#### Slide 25 -Tekstslide

1st mistake:
on p.96
14b:
point (4, 0) must be:
(4, 20) !
Correct this in your
paper book, if possible.

#### Slide 26 -Tekstslide

2nd Mistake:
p.97  C2a:    H(12, 18)  must be:   H(22, 18)
Correct this in your paper book, if possible!

#### Slide 27 -Tekstslide

HOMEWORK:
+  §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 to receiving some good work!