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2TH §8.2 Parallelograms

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WiskundeMiddelbare schoolhavo, vwoLeerjaar 2

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Slide 1 - Diapositive

Entry Ticket

Slide 2 - Diapositive

§8.2 Parallelograms
Learning goal:
how to calculate the area of a parallelogram

Homework: 
§8.2  Do Exercises 10, S10, 12, 13, S14

                     

Slide 3 - Diapositive

Let's do this task together!

Slide 4 - Diapositive

Let's do this task together!
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Slide 5 - Diapositive

Solution:   6 cm wide and 3 cm high

Slide 6 - Diapositive

Let's do this task together!


ANS
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Slide 7 - Diapositive

answer is ....
cm​2​​

Slide 8 - Question ouverte

Solution:   A = 6 x 3 = 
18cm​2​​

Slide 9 - Diapositive

Let's do this task together!
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Slide 10 - Diapositive

Solution:  The part she took off from the parallelogram she put back too!

Slide 11 - Diapositive

Let's do this task together!
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Slide 12 - Diapositive

Solution:    6 x 3 = 
18cm​2​​

Slide 13 - Diapositive

Slide 14 - Vidéo

Note:
The height can be OUTSIDE the parallelogram!
Just like we saw in §8.1 with triangles.

Slide 15 - Diapositive


2 Notes about this task:
PS = 70 (so the whole side)
About the picture on the right. The task is to find the AREA.
       You can work with: base = UV = 5.   and height WY = ..... ?!
How to find WY?
ANS !

Slide 16 - Diapositive

I can find length WY by ......

Slide 17 - Carte mentale

But how to use 
Pythagoras in exercise 10?!
See next slide! We will see how it works in THIS situation.


Slide 18 - Diapositive

Slide 19 - Diapositive

Homework time
Homework: 
§8.2 Do exercises 10, S10, 12, 13, S14
Check your answers with the solutions book.
Watch the Video's on Noordhof
   

Slide 20 - Diapositive

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