Final answer:
A circle divided into many parts in statistics is known as a pie graph or pie chart, which visually represents how an overall total is divided into parts.
Step-by-step explanation:
In statistics, a circle divided into many parts is called a pie graph or a pie chart. This type of graph represents an overall total divided into parts, with each slice of the pie representing a share of the total. For instance, if we have a pie graph showcasing company revenue streams, each slice may represent different product lines with their relative contribution to the overall revenue. Pie graphs give a visual representation that is easy to understand at a glance, particularly for showing proportions and relationships among parts of a whole.