Ada gives the children more examples of regular and irregular polygons to sort, and they talk through their reasoning. This short animated film is from the BBC Teach series, Neon City: Measurement ...

You can always identify the polygon by how many sides it has. For example a pentagon is always a shape that has 5 sides. An equilateral triangle has 3 sides of equal length. The dashes on the ...

Polygons can be regular or irregular in shape. A polygon is a closed 2D shape with at least three sides. A regular polygon is a polygon with all equal sides and angles. An irregular polygon is a ...

Image caption, The advantage of using a frequency polygon is that it allows similar sets of data to be plotted on the same graph. Comparisons between the two sets can then be made. For example ...