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2TH/vwo §3-5 Calculations using similarity (p. 86)
Calculations using
similarity (p. 86)
What you need:
- Textbook, writingbook, iPad
- Pen, pencil, geotriangle
- Calculator
Schoolbags
in the cuboard
Phones
in the phonebag
Bluetooth
- ON
- VPN off
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Slide 1:
Slide
Wiskunde
Middelbare school
havo, vwo
Leerjaar 3
This lesson contains
25 slides
, with
interactive quizzes
and
text slides
.
Lesson duration is:
50 min
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Items in this lesson
Calculations using
similarity (p. 86)
What you need:
- Textbook, writingbook, iPad
- Pen, pencil, geotriangle
- Calculator
Schoolbags
in the cuboard
Phones
in the phonebag
Bluetooth
- ON
- VPN off
Slide 1 - Slide
Slide 2 - Slide
Slide 3 - Slide
Slide 4 - Slide
Slide 5 - Slide
Lesson goal
Calculate unknown angles
using similarity
Calculate unknown sides using similarity
Slide 6 - Slide
How do you calculate the unknown length in similar triangles?
Make a sketch of the triangles next to each other in the same position and include the known measurements.
Check that the triangles are similar.
Calculate the scale factor.
Calculate the unknown length.
Slide 7 - Slide
Slide 8 - Slide
Voorbeeld van docent (p. 86)
Slide 9 - Slide
timer
3:00
IA
Slide 10 - Slide
32 A, respectively
A
C and D
B
D and C
C
C and B
D
D and B
Slide 11 - Quiz
32b
A
3,5
B
4,5
C
5,5
D
5,7
Slide 12 - Quiz
32c
A
18,48 cm
B
16,43cm
C
16,25 cm
D
15,87 cm
Slide 13 - Quiz
timer
5:00
Slide 14 - Slide
3a
A
All angles are equal (F-angles)
B
All angles are equal (Z-angles)
C
All angles are equal (angles of triangle 180)
D
Same scale factor
Slide 15 - Quiz
33b
A
1
B
2
C
3
D
4
Slide 16 - Quiz
33c
A
14
B
5
C
4,5
D
3,5
Slide 17 - Quiz
33d
A
1
B
2
C
3
D
4
Slide 18 - Quiz
Try on your own
1, 2, 5 and 7
TRY ON YOUR OWN...
RULES:
In your writingbook
Use: Textbook
Discussion when you are stuck is allowed
timer
12:00
Extra excercise: M6 and M7
(p. 97)
Challenge: C3
(p. 98)
37, 38, 39
(p. 88)
Slide 19 - Slide
Slide 20 - Slide
Slide 21 - Slide
Slide 22 - Slide
Slide 23 - Slide
Slide 24 - Slide
Slide 25 - Slide
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