Question 7:
In diagram below, ABC is a semicircle with centre O.
Calculate the area, in cm2 , of the shaded region.
Solution:
In diagram below, ABC is a semicircle with centre O.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/12/Picture98-300x279.png)
Solution:
Question 8:
In diagram below, ABC is an arc of a circle centre O
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/12/Picture99.png)
The radius of the circle is 14 cm and AD = 2 DE.
Calculate the perimeter, in cm, of the whole diagram.
Solution:
In diagram below, ABC is an arc of a circle centre O
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/12/Picture99.png)
The radius of the circle is 14 cm and AD = 2 DE.
Calculate the perimeter, in cm, of the whole diagram.
Solution:
Question 9:
In diagram below, KLMN is a square and KLON is a quadrant of a circle with centre K.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/12/Picture111.png)
Calculate the area, in cm2, of the coloured region.
Solution:
In diagram below, KLMN is a square and KLON is a quadrant of a circle with centre K.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/12/Picture111.png)
Calculate the area, in cm2, of the coloured region.
Solution: