2TTO Ch6 Pythagoras REFRESH

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 2

Ch6 Pythagoras' theorem

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 vertex 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 R8 in the same way!

The book also explains fine, as you see here:

Homework time!

Do REFRESH p.206/207 now.

Later some more slides come up.

Evaluation