Question:
Benson uses some wirte to make the figure as shown. He made 2 identical wire structures and joined them with a piece of wire AB. Each wire structure was formed by a large semi-cirlce, a small semi-circle and 2 straight lines.
(a) What is the radius of a small semi-circle?
(b) Find the length of wire used to make the figure.
Take π = 3.14
Solution:
![P6 / Nanyang / 2019 / CA1 / Paper 1 – Q02 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2022/04/P6_CA1_2019_Nanyang_Paper1_Q02-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / ACS / 2019 / CA1 – Q12 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/01/P6_ACS_2019_CA1_Q12-Qns.jpg?resize=400%2C260&ssl=1)