Question

(a) Find the area of the shaded region in the figure below. (Take a = 3.14)

4 m
5 m
12 m
[31
(6)
(11)
(c)
14 m
TH
6m: fom
Ilm
*
- 7 m
5 m
th
The figure shows the plan of a room. Find the
(i)
perimeter of the whole room
area of the whole room
[3]
8
[2]
6
/13 cm 2
3
5
4
The diagram shows a circle of radius 13cm being divided into S equal sectors. Find
the
(i)
(1)
Area of the circle,
Total area of the sectors 1 , 3, 5 and 7
[Take 3.14]

Answer 1

Explanation:

Firstly find the area if the parallelogram which is

=length of the base × vertical height

=

`12m * 5m`

=

`60 {m}^(2)`

Now solve for the area of the circle

=

`\pi {r}^(2)`

RADIUS = DIAMETER ÷2

`(4m)/(2)`

=

`2m`

so the area of the circle

=

`(22)/(7) * 2m * 2m`

`(22)/(7) * 4 {m}^(2)`

`12.57 {m}^(2)`

subtract the area of the circle from the parallelogram

=

`60 {m }^(2) - 12.57 {m}^(2)`

=

`47.43 {m}^(2)`

Done