Identifying 2D shapes Find out about regular 2D shapes and irregular polygons. What is an angle? Discover the different types of angles and how to make sure you get the biggest slice of pizza.

Shape A, B and C all have 4 sides and 4 corners, but can you see that Shape D has 5 sides and 5 corners. This is the odd one out. A shape with 5 sides and 5 corners is called a pentagon.