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
1 / 25
volgende
Slide 1: Tekstslide
WiskundeMiddelbare schoolhavo, vwoLeerjaar 3

In deze les zitten 25 slides, met interactieve quizzen en tekstslides.

time-iconLesduur is: 50 min

Onderdelen in deze les

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 - Tekstslide

Slide 2 - Tekstslide

Slide 3 - Tekstslide

Slide 4 - Tekstslide

Slide 5 - Tekstslide

Lesson goal
  • Calculate unknown angles using similarity
  • Calculate unknown sides using similarity

Slide 6 - Tekstslide

How do you calculate the unknown length in similar triangles?
  1. Make a sketch of the triangles next to each other in the same position and include the known measurements. 
  2. Check that the triangles are similar.
  3. Calculate the scale factor.
  4. Calculate the unknown length.

Slide 7 - Tekstslide

Slide 8 - Tekstslide

Voorbeeld van docent (p. 86)

Slide 9 - Tekstslide

timer
3:00
IA

Slide 10 - Tekstslide

32 A, respectively
A
C and D
B
D and C
C
C and B
D
D and B

Slide 11 - Quizvraag

32b
A
3,5
B
4,5
C
5,5
D
5,7

Slide 12 - Quizvraag

32c
A
18,48 cm
B
16,43cm
C
16,25 cm
D
15,87 cm

Slide 13 - Quizvraag

timer
5:00

Slide 14 - Tekstslide

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 - Quizvraag

33b
A
1
B
2
C
3
D
4

Slide 16 - Quizvraag

33c
A
14
B
5
C
4,5
D
3,5

Slide 17 - Quizvraag

33d
A
1
B
2
C
3
D
4

Slide 18 - Quizvraag

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 - Tekstslide

Slide 20 - Tekstslide

Slide 21 - Tekstslide

Slide 22 - Tekstslide

Slide 23 - Tekstslide

Slide 24 - Tekstslide

Slide 25 - Tekstslide