Question 2:
Diagram below shows a semicircle PTQ, with centre O and quadrant of a circle RST, with centre R.
[Use π = 3.142]
Calculate
(a) the value of θ, in radians,
(b) the perimeter, in cm, of the whole diagram,
(c) the area, in cm2, of the shaded region.
Solution:
Diagram below shows a semicircle PTQ, with centre O and quadrant of a circle RST, with centre R.
![](http://spmaddmaths.blog.onlinetuition.com.my/wp-content/uploads/sites/3/2014/09/Picture27.png)
Calculate
(a) the value of θ, in radians,
(b) the perimeter, in cm, of the whole diagram,
(c) the area, in cm2, of the shaded region.
Solution: