Question:
Study the pattern carefully and answer the questions that follow.
(a) How many triangles are needed to form Pattern 25?
(b) Which pattern is made up of 217 straight lines?
(c) What is the total number of triangles and squares needed to form Pattern 48?
Solution:
![P6 / Henry Park / 2020 / SA2 Prelims / Paper 1 – Q18 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/08/P6_SA2_2020_Henry_Park_Paper1_Q18-Qns.jpg?resize=400%2C211&ssl=1)
![P6 / Catholic High / 2021 / SA2 / Paper 1
– Q13 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2022/05/P6_SA2_2021_Catholic_High_Paper1_Q13-Qns.jpg?resize=400%2C260&ssl=1)