Jennifer has an MS in Chemistry and a BS in Biological Sciences. A circle graph is a circular chart divided into sections that each represent a percentage of the total. This lesson will define a circle graph and give some examples of types of circle graphs.Click to see full answer. Consequently, what is a circle graph used for?A circle is the same as 360°. A part of a circle is called an arc and an arc is named according to its angle. A circle graph, or a pie chart, is used to visualize information and data. A circle graph is usually used to easily show the results of an investigation in a proportional manner.Additionally, when would a scientist use a circle graph? In a pie chart or circle graph, the size of each sector will be proportional to the actual value of the data it represents as seen in the images. Percentages of the total of the sample are usually represented in the sectors. One of the more common uses for circle graphs or pie charts is poll results and surveys. Considering this, what is the difference between a pie chart and a circle graph? The area of each segment is the same proportion of a circle as the category is of the total data set. Circle graphs/pie charts usually show the component parts of a whole. This ratio works because the total percent of the circle graph/pie chart represents 100% and there are 360 degrees in a circle.What are the characteristics of a circle graph?The graph is in the shape of a circle with different wedges that each represent a percentage of a total. These wedges often look like pieces of pie, which is why the circle graph is sometimes referred to as a pie chart. Each angle of the circle graph is proportional to the quantity it represents.