2018 2marks ACS P6 Paper1 SA1 P6 / ACS / 2018 / SA1 / Paper 1 – Q13 [2 marks] Question: Find the sum of ∠a, ∠b, ∠c and ∠d. Solution: Similar Posts P6 / Catholic High / 2021 / SA2 / Paper 1 – Q18 [1 mark] P6 / Nan Hua / 2021 / SA2 / Paper 2 – Q11 [3 marks]