Question 4:
Diagram below shows two sectors. ABCD is a quadrant and BED is an arc of a circle with centre C.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2015/11/Picture34-300x287.png)
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2015/11/Picture34-300x287.png)
Calculate the area of the shaded region, in cm2.
Solution:
Question 5:
Diagram below shows a square KLMN. KPN is a semicircle with centre O.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/07/Picture35.png)
Calculate the perimeter, in cm, of the shaded region.
Solution:
Perimeter of the shaded region
= KL + LM + MN + NP + Arc length PK
= 14 + 14 +14 + 9.90 + 11
= 62.90 cmQuestion 6:
In the diagram below, CD is an arc of a circle with centre O.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/12/Picture97-1.png)
Determine the area of the shaded region.
Solution:
In the diagram below, CD is an arc of a circle with centre O.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/12/Picture97-1.png)
Determine the area of the shaded region.
Solution: