H9 'Measuring' -- §2

Last week
- Quantities and units
- Units of length
- Converting units
- Scale
CHAPTER 9:    Measuring
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Slide 1: Slide
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This lesson contains 15 slides, with interactive quiz and text slides.

time-iconLesson duration is: 45 min

Items in this lesson

Last week
- Quantities and units
- Units of length
- Converting units
- Scale
CHAPTER 9:    Measuring

Slide 1 - Slide

Today, you will learn ...

... what an area is and what perimeter is.
... different units of area.
... how to convert units of area.
... how to calculate the area of a rectangle.
CHAPTER 9:    Measuring

Slide 2 - Slide

AREA
PERIMETER
8 ha
(=8hm²)
??
2.8km
??

Slide 3 - Slide

The perimeter of a shape is the total length of the edges.


40+22+20+40+31 = 153 cm

Slide 4 - Slide

Area is about how much space is covered.

The area of a shape is how many times the unit of area fits onto it.

Slide 5 - Slide

Units of area

Slide 6 - Slide

Units of area
80 dm² = ... m²
80 dm² = 0.8m²
4.5 m² = ... cm²
4.5 m² = 450 dm²
4.5 m² = 45,000 cm²

Slide 7 - Slide

Area of a rectangle 

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2

Slide 8 - Slide

Area of a rectangle 

a) Calculate the perimeter and the area of a rectangle measuring 7 by 4 cm.

b) Calculate the perimeter and the area of a square with sides measuring 5 m.
timer
5:00
 finished?
> exercises 17c,d, 18

Slide 9 - Slide

a) Calculate the perimeter and the area of a rectangle measuring 7 by 4 cm.
b) Calculate the perimeter and the area of a square with sides measuring 5 m.

Slide 10 - Open question

Area of a rectangle 

a) Calculate the perimeter and the area of a rectangle measuring 7 by 4 cm.



b) Calculate the perimeter and the area of a square with sides measuring 5 m.
Perimeter  7+4+7+4= 22 cm
Area    7x4 = 28 cm2
Perimeter  5+5+5+5= 20 m
Area    5x5 = 25 m2

Slide 11 - Slide

Start making exercises 9-22

Slide 12 - Slide

Today, we have learned ...?



Slide 13 - Slide

  • Tomorrow: mandatory!
  • Exercises 9-22
  • Next week (tuesday): QUIZ
  • 9th of June: TEST

Slide 14 - Slide

QUIZ 9.1/9.2
  • Quantity, unit
  • Units of length
  • Converting units of length
  • Scale
  • Perimeter
  • Area
  • Units of area
  • Converting units of area
  • Area of a rectangle

Slide 15 - Slide