A triangular metal brace has vertices LLL, MMM, and NNN. The side LN LN\,LN has a length of 12.5 cm, the side NM NM\,NM has a length of 9.2 cm, and the side LM LM\,LM has a length of 14.8 cm.
Work out the size of angle LNMLNMLNM.
Give your answer to 3 significant figures.
36 exam-style questions on AQA GCSE Maths The Cosine Rule. Each one has a worked solution and a mark scheme showing where the marks go.