Question:
In the figure below, ABCD is a square of side 20 cm. O is the centre of the square. ABD is a quadrant. AOB and AOD are identical semicircles.
(a) Find the perimeter of the shaded part.
(b) Find the area of the shaded part.
(Take π = 3.14)
Solution:
![P6 / Methodist Girls / 2021 / SA2 / Paper 1 – Q07 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2022/06/P6_SA2_2021_Methodist_Girls_Paper1_Q07-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Catholic High / 2020 / SA2 Prelims / Paper 1 – Q12 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/06/P6_SA2_2020_Catholic_High_Paper1_Q12-Qns.jpg?resize=400%2C260&ssl=1)