Question:
In the figure below, two identical squares, P and S, and two identical semicircles, Q and R, lie within a large square ABCD. The area of the large square ABCD is 324 cm².
(a) What is the radius of the semicircle?
(b) Find the perimeter of the shaded area. Take π = 3.14.
Solution:
![P6 / ACS / 2019 / CA1 – Q08 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/01/P6_ACS_2019_CA1_Q08-Qns.jpg?resize=400%2C199&ssl=1)
![P6 / Tao Nan / 2019 / SA2 / Paper 2 – Q10 [3 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/07/P6_Tao_Nan_2019_Prelims_Paper2_Q10-Qns.jpg?resize=400%2C260&ssl=1)