Question 9 (7 marks):
Mathematics Society of SMK Mulia organized a competition to design a logo for the society.
![](http://spmaddmaths.blog.onlinetuition.com.my/wp-content/uploads/sites/3/2019/08/Picture16-300x300.png)
Diagram shows the circular logo designed by Adrian. The three blue coloured regions are congruent. It is given that the perimeter of the blue coloured region is 20π cm.
[Use π = 3.142]
Find
(a) the radius, in cm, of the logo to the nearest integer,
(b) the area, in cm2, of the yellow coloured region.
Solution:
(a)
(b)
![](http://spmaddmaths.blog.onlinetuition.com.my/wp-content/uploads/sites/3/2019/08/Picture22-300x217.png)
Mathematics Society of SMK Mulia organized a competition to design a logo for the society.
![](http://spmaddmaths.blog.onlinetuition.com.my/wp-content/uploads/sites/3/2019/08/Picture16-300x300.png)
Diagram shows the circular logo designed by Adrian. The three blue coloured regions are congruent. It is given that the perimeter of the blue coloured region is 20π cm.
[Use π = 3.142]
Find
(a) the radius, in cm, of the logo to the nearest integer,
(b) the area, in cm2, of the yellow coloured region.
Solution:
(a)
(b)
![](http://spmaddmaths.blog.onlinetuition.com.my/wp-content/uploads/sites/3/2019/08/Picture22-300x217.png)