Triangle LMN LMN\,LMN is an isosceles triangle. LM=LNLM = LNLM=LN. The exterior angle at vertex M M\,M is 115∘115^\circ115∘.
Work out the size of the interior angle x x\,x at vertex MMM.
Work out the size of the angle y y\,y at vertex LLL.
Give reasons for your answer.
27 exam-style questions on Edexcel GCSE Maths Angles. Each one has a worked solution and a mark scheme showing where the marks go.