Chart description
Describing Bar Charts and Column Charts (1) Bar charts and column charts are similar: only their orientations differ. A bar chart is orientated horizontally, whereas a column chart is arranged vertically. Sometimes "bar chart" refers to both forms. These types of charts are usually used for comparison purposes (unlike line charts, which describe change). Look at the bar chart, question and sample answer and do the exercises to improve your writing skills. Writing about a bar chart | LearnEnglish Teens - British Council Jump to navigation If we want to compare different categories that are close in size, a pie chart does not always help us to do this. If one slice has a central angle of 30 degrees, and another has a central angle of 29 degrees, then it would be very hard to tell at a glance which pie piece is larger than the other.