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1819 G2X §8.Refresh
What number should be written on the dots?
1.25 km = .... m
1 / 11
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Slide 1:
Open question
Wiskunde
Middelbare school
havo, vwo
Leerjaar 2
This lesson contains
11 slides
, with
interactive quizzes
and
text slides
.
Lesson duration is:
50 min
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Items in this lesson
What number should be written on the dots?
1.25 km = .... m
Slide 1 - Open question
What number should be written on the dots?
5
0
c
m
2
=
.
.
.
m
m
2
Slide 2 - 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 3 - 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 4 - 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 =
4
⋅
4
=
1
6
2
3
⋅
1
=
1
.
5
1
6
−
4
⋅
1
.
5
=
1
0
Slide 5 - Slide
Pythagoras' theorem
If you know two sides of a right angled triangle, you can calculate the third side using Pythagoras' Theorem:
Slide 6 - Slide
Pythagoras' theorem
Calculate the lenght of side AC in triangle ABC, where BC = 13, AB = 5 and angle A is 90°
Slide 7 - Slide
Pythagoras' theorem
Calculate the lenght of side AC in triangle ABC, where BC = 13, AB = 5 and angle A is 90°
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
HW Tuesday 27-5
Make and correct §8.Refresh
Slide 11 - Slide
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