In deze les zitten 15 slides, met interactieve quiz en tekstslides.
Lesduur is: 45 min
Onderdelen in deze les
Last week
- Quantities and units
- Units of length
- Converting units
- Scale
CHAPTER 9: Measuring
Slide 1 - Tekstslide
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 - Tekstslide
AREA
PERIMETER
8 ha
(=8hm²)
??
2.8km
??
Slide 3 - Tekstslide
The perimeter of a shape is the total length of the edges.
40+22+20+40+31 = 153 cm
Slide 4 - Tekstslide
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 - Tekstslide
Units of area
Slide 6 - Tekstslide
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 - Tekstslide
Area of a rectangle
1
2
Slide 8 - Tekstslide
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 - Tekstslide
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 vraag
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.