1mark 2021 Henry Park P6 Paper1 SA2 P6 / Henry Park / 2021 / SA2 / Paper 1 – Q05 [1 mark] Question: Which two lines are perpendicular to each other? Solution: Similar Posts P6 / ACS / 2018 / SA1 / Paper 2 – Full Paper Solution P6 / Tao Nan / 2019 / SA1 / Paper 2 – Q01 [2 marks]