2TH §8.2 Parallelograms

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https://www.geogebra.org/m/usjFuvYm

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Slide 1: Slide

WiskundeMiddelbare schoolhavo, vwoLeerjaar 2

This lesson contains 20 slides, with interactive quizzes, text slides and 1 video.

Lesson duration is: 45 min

Items in this lesson

Geogebra

https://www.geogebra.org/m/usjFuvYm

Slide 1 - Slide

Entry Ticket

Slide 2 - Slide

§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 - Slide

Let's do this task together!

Slide 4 - Slide

Let's do this task together!

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0:15

Slide 5 - Slide

Solution: 6 cm wide and 3 cm high

Slide 6 - Slide

Let's do this task together!

ANS

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0:15

Slide 7 - Slide

answer is ....

c m^{​ 2 ​ ​}

Slide 8 - Open question

Solution: A = 6 x 3 =

18 c m^{​ 2 ​ ​}

Slide 9 - Slide

Let's do this task together!

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0:20

Slide 10 - Slide

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

Slide 11 - Slide

Let's do this task together!

timer

0:20

Slide 12 - Slide

Solution: 6 x 3 =

18 c m^{​ 2 ​ ​}

Slide 13 - Slide

Slide 14 - Video

Note:

The height can be OUTSIDE the parallelogram!

Just like we saw in §8.1 with triangles.

Slide 15 - Slide

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 - Slide

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

Slide 17 - Mind map

But how to use

Pythagoras in exercise 10?!

See next slide! We will see how it works in THIS situation.

Slide 18 - Slide

Slide 19 - Slide

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 - Slide

2TH §8.2 Parallelograms

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Slide 8 - Open question

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Slide 14 - Video

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