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Interior angles and the triangle method

Interior angles and the triangle method

Hexagon split into four triangles from one vertex, showing how a polygon can be divided into triangles to find the interior angle sum A polygon is a flat 2D shape with straight sides, and a vertex is a corner. An interior angle is the angle inside the polygon at a vertex.

Angles in Polygons Lesson

  1. IGCSE
  2. /Maths
  3. /Angles in Polygons

Step-by-step lessons covering CIE IGCSE Maths Angles in Polygons for Core and Extended tier. Each lesson works through exam-style questions in Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended) format. Start with the Core-tier fundamentals in number and algebra before moving on to the more demanding Extended-only topics like calculus-adjacent algebra and advanced trigonometry.

Lessons