# 1819 C2X Extra Lesson

What shall we do today & Tuesday?
(in all cases, HW for after WFweek is §8.R and §8.1)
A
Today: only ch11 questions Monday: test CH11 Tuesday: §8.R & §8.1
B
Today: §8.R and ch11 questions Monday: Test Ch11 Tuesday: §8.1
C
Today: only §8.R Monday: test CH11 Tuesday: §8.1
D
No preference
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Slide 1: Quiz
WiskundeMiddelbare schoolhavo, vwoLeerjaar 2

This lesson contains 14 slides, with interactive quizzes and text slides.

Lesson duration is: 50 min

## Items in this lesson

What shall we do today & Tuesday?
(in all cases, HW for after WFweek is §8.R and §8.1)
A
Today: only ch11 questions Monday: test CH11 Tuesday: §8.R & §8.1
B
Today: §8.R and ch11 questions Monday: Test Ch11 Tuesday: §8.1
C
Today: only §8.R Monday: test CH11 Tuesday: §8.1
D
No preference

#### Slide 1 -Quiz

What questions do you have about CH11?

#### Slide 2 -Mind map

What number should be written on the dots?
1.25 km = .... m

#### Slide 3 -Open question

What number should be written on the dots?

50cm2=...mm2

#### Slide 4 -Open question

Converting units of length and area
Units of length are multiplied/divided with steps of 10
Units of area are multiplied/divided with steps of 100

#### Slide 5 -Slide

Enclosing figures (R3g)
Calculate the area of figures ABCD, KLM and PQR by enclosing.

When enclosing a figure, you use the fact that the area of a right-angled triangle is half a rectangle.

#### Slide 6 -Slide

Enclosing figures (R3g)
Calculate the area of figures ABCD, KLM and PQR by enclosing
Area ABCD:
Area red square =
Area triangles on outside =

Area ABCD =
44=16
231=1.5
1641.5=10

#### Slide 7 -Slide

Pythagoras' theorem
If you know two sides of a right angled triangle, you can calculate the third side using Pythagoras' Theorem:

#### Slide 8 -Slide

Pythagoras' theorem
Calculate the lenght of side AC in triangle ABC, where BC = 13, AB = 5 and angle A is 90°

#### Slide 9 -Slide

Pythagoras' theorem
Calculate the lenght of side AC in triangle ABC, where BC = 13, AB = 5 and angle A is 90°

#### Slide 10 -Slide

Pythagoras' theorem
Calculate the lenght of side AC in triangle ABC, where BC = 13, AB = 5 and angle A is 90°

#### Slide 11 -Slide

Pythagoras' theorem
Calculate the lenght of side AC in triangle ABC, where BC = 13, AB = 5 and angle A is 90°

#### Slide 12 -Slide

HW Tuesday 11-6
Make and correct §8.Refresh and §8.1

#### Slide 13 -Slide

What questions do you have about CH11?