### Mensuration 2 (Rectangle Area +)

```Remember: The
perimeter of a
shape is a
measure of
distance around
the outside.
Units of distance
mm
AREA
1 cm
1 cm
1 cm 1 cm2
Area is measured in units2
6 cm
cm
The area of a
shape is a
measure of the
surface/space
contained within
its perimeter.
Units of area
mm2
cm2
m
m2
km
km2
inches
3
cm
18 cm2
inches2
feet
feet2
yards
yards2
miles
miles2
Area = 6 cm x 3 cm = 18 cm2
Rectangle
1
2
3
Length
Width
Area
10 cm
Area = length x width
6 cm
= 10 cm x 6 cm = 60 cm squares
7 mm
Area = length x width
2 mm
= 7mm x 2mm = 14 mm squares
3m
18
m2
28 m2 7 m
6m
4m
5m
3m
15
m2
4m
2m
8 m2
Page 149
Square
Length
Width
Area
3
1
3
mm
5m
4
2
7
mm
Area = S x S =
= 7 x 7= 49 mm2
10
cm
Area = S x S =
= 10 x 10 = 100
cm2
8m
4m
16 m2
64 m2
9m
81 m2
6m
36 m2
Page 149
Area of rectangle = 60 cm2 , length = 10 cm
Find width ..
Area of rectangle = 45 cm2 , width = 5 cm
Find length.
Area of square = 25cm2 , Find side length
Area of square = 81cm2 , Find side length
Warm up
Find the Area
5m
25 m
2
9m
81 m
2
2m
12 m2
6m
28 m2
7m
4m
Area of a Triangle
The area of a triangle = ½ the area of the surrounding
rectangle/parallelogram
width
heigh
length
base
Area of a triangle = ½ base x height
Find the area of the following triangles.
9 cm
16 cm
8 cm
14 cm
4m
2m
21cm2
20 cm2
4m
15 mm
2
6 m2
3m
Page 155
Area of a Parallelogram

height
Area = base x height
base
height
Area = base x height
base
The area of a
parallelogram
= the area of a
rectangle on the same
base.
Find the area of each parallelogram below.
1
2
12 cm
5 mm
8mm
8 cm
3
5m
78 cm2
63 cm2
9 mm
36 mm2 4 mm
10cm
50 cm2
5 cm
```