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1TH/Vwo §4.2 Distances
§ 4.2 DISTANCES
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Wiskunde
Middelbare school
vwo
Leerjaar 1
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§ 4.2 DISTANCES
Slide 1 - Diapositive
I wonder ....
Last lesson you've learned a lot, in § 4.1 LINES.
Do you really KNOW and UNDERSTAND it?
To help you out, let's do a few Activities about § 4.1.
Slide 2 - Diapositive
ACTIVITY 1:
- get your pencil + geo triangle
- open your Notebook
- make a PAIR of PARALLEL LINES
Slide 3 - Diapositive
ACTIVITY 2:
- get your pencil + geo triangle
- make a PAIR of PERPENDICULAR LINES
Slide 4 - Diapositive
Let's have a close look at a more difficult exercise.
Answer question 7a in the next slide.
Choose one pair of parallel sides.
timer
0:20
Slide 5 - Diapositive
Which sides are PARALLEL ?
A
PQ and PT
B
PQ and ST
C
PT and QR
D
PT and RS
Slide 6 - Quiz
Think hard about 7b now!
Someone will get the turn do try 7b on the metal white board.
Your teacher will copy the picture there.
Slide 7 - Diapositive
Think hard about 7c now!
Someone will get the turn do try 7c on the metal white board.
Your teacher will copy the picture there.
Slide 8 - Diapositive
Think hard about 7d now!
Someone will get the turn do try 7d on the metal white board.
Your teacher will copy the picture there.
Finally: next slide shows you all the answers together in one picture!
Slide 9 - Diapositive
Solutions:
Slide 10 - Diapositive
This was a RECAP of § 4.1
Now about § 4.2 !
We are going to MEASURE DISTANCES
An Introduction follows now!
Slide 11 - Diapositive
Here we see Leanne sailing.
What is the SHORTEST DISTANCE for her to sail to the coast?
Think about this and
Compare your answer to your neighbor's.
timer
0:30
Slide 12 - Diapositive
Distances
- You will see how to measure the DISTANCE from a POINT and a LINE.
- You will see how to measure the DISTANCE from a LINE to another LINE .
- NOTE: you don't have to understand or know all of it right away,
however watching the following slides carefully will certainly help you
when doing § 4.2 Distances, later!
Slide 13 - Diapositive
Slide 14 - Diapositive
Practice this yourself, now! (1)
- Take your GEO tringle and a pencil in your hand.
- Open your Notebook.
- Draw a straight line n and a point R.
- Place your GEO as in the THEORY above and
- Draw a line segment from the Line to the Point.
- Measure the distance from Line to Point and
- Write this in your Notebook.
Slide 15 - Diapositive
Slide 16 - Diapositive
Practice this now (2):
- Draw two Parallel Lines, as you learned in §4.1.
- Choose the Distance between both lines yourself.
- Measure the Distance between the two lines and
- Write this down, next to your drawing.
Slide 17 - Diapositive
Homework time
Later a few more slides follow, about the last exercises.
timer
10:00
Slide 18 - Diapositive
For today I asked you to bring a PAIR OF COMPASSES.
Show me your COMPASSES now!
Slide 19 - Diapositive
Slide 20 - Diapositive
Homework time
Make sure you have little homework !
Slide 21 - Diapositive
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