H9 'Measuring' -- §2 part 2

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

Today, we will ...

... walk through yesterday's quiz.
... go over theory C : Calculating areas  (§2)

CHAPTER 9:    Measuring

hm

dam

m

dm

mm

hm

dam

m

dm

mm

x 10

x 10

: 10

: 10

km²

cm²

m²

dm²

mm²

(=hm²)

(=dam²)

km²

cm²

m²

dm²

mm²

x 100

x 100

: 100

: 100

(=hm²)

(=dam²)

a) 53 m = 530 dm = 5300 cm 

b) 400 m = 40 dam = 4 hm = 0.4 km

c) 1200 m² = 12 are

d) 3300 m² = 3300 dm² = 330000 cm²

km

a) Perimeter        6 + 4 + 6 +4 = 20 cm

b) Area                  6 x 4 = 24 cm²

a)    1 : 50

b)    54 x 50 = 2700 cm   ( = 27 m)

Theory C : Calculating areas

Theory C : Calculating areas

5

5

6

4

12

1

area =
25

area =
24

area = 12

Exercise 23

NEXT WEEK

• Exercises 23-27 done!
• §3 The area of a triangle

How did we work today?

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