JKLM JKLM\,JKLM is a square metal plate. The diagonal of the plate is 20 mm.
Calculate the perimeter of the metal plate. Give your answer correct to one decimal place.
Practise Edexcel GCSE Maths Pythagoras with exam-style questions for Foundation and Higher tier. 55 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.