Question:
The figure below is made up of 1 big semi-circle and 4 smaller identical semi-circles. O is the centre of the big semi-circle. XY is 84 m.
(a) Find the perimeter of the shaded part.
(b) Find the area of the shaded part.
(Take π = 22/7)
Solution:
![P6 / ACS / 2020 / SA2 Prelims / Paper 1 – Q28 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/05/P6_SA2_2020_ACS_Paper1_Q28-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Nan Hua / 2020 / SA2 Prelims / Paper 1 – Q10 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2022/02/P6_SA2_2020_Nan_Hua_Paper1_Q10-Qns.jpg?resize=400%2C260&ssl=1)