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Angles in Polygons
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Interior and exterior angles

Interior and exterior angles

Pentagon with one interior angle inside, one exterior angle outside, and a straight line showing they add to 180° A polygon is a flat 2D shape with straight sides, and each corner is called a vertex. The angle inside the shape is an interior angle.

Angles in Polygons Lesson

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

Step-by-step lessons on CCEA GCSE Maths Angles in Polygons. Each one builds up to exam-style questions. Build fluency with number, ratio and algebra first, since geometry, probability and statistics topics rely on them, and leave extra time nearer the exam for Higher-tier problem-solving and multi-step reasoning questions.