It is called the key or legend.
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legend
The legend, or key.
No. A circle graph - or pie graph - is designed so that the whole circle represents 100%. It is, therefore, not possible for the graph to represent more than 100%.
The difference lies in the usage of the words. For example a graph is used in math, and charts are simply a way to represent different types of data.
Charts and graph is an amazing visual tool to explain a concept to an audience. Since many people are more visual, seeing a graph or chart that represents the information can help people visualize the concept.
It is the key or legend.
legend
Yes, one section of a circle graph (or pie chart) can represent 110, but it's important to clarify what that number signifies. If 110 represents a count or a value related to a category, it can be visually depicted as a section of the graph. However, the entire circle graph must represent a total that makes sense in relation to that number, such as a total of 220, where the 110 would be half of the total.
You can't. It's virtually impossible.
The legend or key.
There are many different kinds of charts. A few would be a graph, bar graph, flow charts, pie charts, pictograph, line graphs, histogram, dot plot, and scatterplot.