2TTO Ch6 Pythagoras REFRESH

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• Middelbare school
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• Leerjaar 2

Ch6 Pythagoras' theorem

REFRESH, p.198/199 = Homework today

Let's have a look at a few Math words.

Answer the following questions!

What is a cuboid?

1. a square
2. a rectangle
3. an object, more or less cubic in shape
4. a circle

Explain face, edge and vertix in the right order:

1. hoekpunt, vlak, rand
2. aangezicht, rand, hoekpunt
3. zijde, ribbe, hoekpunt
4. zijde, hoekpunt, ribbe

cm​2​​

What is the length of a side of a square with area 121 ?

What is the length of a side of a square with an area of 15 ?

cm​2​​

√​15​​​

√​15​​​

√​15​​​

1. root 15
2. 60
3. 15 : 4 = 4.75
4. sqrt 15 (= square root 15)

Squaring:

= 5 x 5 = 25

= c x c ,    but now:

=   ......

5​2​​

c​2​​

(√​10​​​)​2​​

(√​10​​​)​2​​

= .......

Watch this:

   =                            x                       = 10

In the same way goes:

=                      x                      =

4 x 4 x            x                = 16 x 6 =    96

(√​10​​​)​2​​

√​10​​​

√​10​​​

(4√​6​​​)​2​​

4√​6​​​

4√​6​​​

√​6​​​

√​6​​​

Do R7 in the same way!

The book also explains fine, as you see here:

Homework time!

Do REFRESH p.198/199 now.

Later some more slides come up.

Homework time again!

Make sure you finish most of it this lesson!

R2, R4, R5, R6 and R7 of chapter 6