JKLM JKLM\,JKLM is a quadrilateral.
Three of the interior angles are 115∘,78∘, 115^\circ, 78^\circ,\,115∘,78∘, and 92∘92^\circ92∘.
Work out the size of angle MMM.
83 exam-style questions on CCEA GCSE Maths Angles in Polygons. Each one has a worked solution and a mark scheme showing where the marks go.