GCSE; Edexcel; 2-dimensional shapes - Edexcel Perimeter. 2-dimensional shapes are flat. The perimeter of a 2D shape is the total distance around the outside of the shape.

Learn about and revise different 2-dimensional shapes and their properties with GCSE Bitesize AQA Maths. ... The perimeter of a 2D shape is the total distance around the outside of the shape.