# 2TH Ch6 REFRESH

Ch6 Pythagoras' theorem
REFRESH, p.206/207 = Homework today
Let's have a look at a few Math words.
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Slide 1: Slide
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This lesson contains 20 slides, with interactive quizzes and text slides.

Lesson duration is: 45 min

## Items in this lesson

Ch6 Pythagoras' theorem
REFRESH, p.206/207 = Homework today
Let's have a look at a few Math words.

#### Slide 1 -Slide

What is a cuboid?
A
a cube
B
a rectangle
C
a 3D object with 6 sides and only right angles
D

#### Slide 2 -Quiz

Explain face, edge and vertex in the right order:
A
hoekpunt, vlak, rand
B
aangezicht, rand, hoekpunt
C
zijde, ribbe, hoekpunt
D
zijde, hoekpunt, ribbe

#### Slide 4 -Slide

What kind of triangle is this?

ANS

#### Slide 5 -Slide

What is the name of this triangle:
timer
0:30
A
an isosceles triangle
B
an equilateral triangle
C
a right-angled triangle
D
a terrible triangle

#### Slide 8 -Slide

Homework time!
Do REFRESH p.206/207 now.
Later some more slides come up.
timer
10:00

#### Slide 9 -Slide

timer
0:30
What is the length of a side of a square with area
121 squared cm ?

#### Slide 10 -Mind map

Solution:
A square with area 121
is 11 cm, because 11 x 11 = 121
cm2

#### Slide 11 -Slide

What is the length of a side of a square with an area of 15 squared centimetres ?
15
15
15
timer
0:30
A
root 15
B
60
C
15 : 4 = 4.75
D
square root 15

#### Slide 12 -Quiz

Solution:
If this square has 15          ,
the lengths of the sides are                 cm.
cm2
15

#### Slide 14 -Slide

Squaring:
= 5 x 5 = 25
= c x c ,    but now:
=   .....
ANS

52
c2
(10)2
timer
0:30

(10)2
= .......

#### Slide 16 -Mind map

Solution:
=                            x                       =   10
(10)2
10
10

#### Slide 17 -Slide

Let's go a little further:
=                            x                       = 10
Now also in this way goes:
=                      x                      =
4 x 4 x            x                = 16 x 6 =    96
(10)2
10
10
(46)2
46
46
6
6

#### Slide 18 -Slide

Do R8 in the same way!
Look at this example:

#### Slide 19 -Slide

Homework time again!
Make sure you finish most of it in this lesson!