Find the missing angles in irregular polygons using the sum of interior angles formula.
Worksheet titled "WORKOUT POLYGONS" with a notice on the sum of interior angles formula (n-2) × 180°, featuring 12 irregular polygon diagrams labeled (a) to (l), each with some angles given and one missing angle marked as 'x'. Below the diagrams, a table provides possible answers in degrees. The worksheet is designed for Grade 6 students.