A wooden roof truss is in the shape of an isosceles triangle with a base of 18 m and two equal sides of length 14 m.
Calculate the perpendicular height of the truss.
Give your answer correct to 3 significant figures.
Practise AQA GCSE Maths Pythagoras with exam-style questions for Foundation and Higher tier. 55 questions, matched to the AQA GCSE Maths (8300) 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.