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Why circle chart called pie chart?
Because the whole is round, like some pies, and the sections are shaped like the pieces of a pie.
Why is a pie graph called a pie graph?
I'm guessing because it has nothing to do with 3.14, it's because it is shaped like a pie!
A region of a circle often called a pie slice?
Is also called a segment.
How do you calculate the area of part of a circle?
To work out the area of a circle, you have to learn something called 'PIE'or 'PI' in Greek. Pie = 3.14. Search 'What is pie?' on this to find out the next part...
How are circle line and bar graphs alike and different?
A circle graph (also called pie chart, because the different data representations look like slices of a pie) will represent the data as a portion (percentage) of the whole (a full circle). A bar graph will show absolute values of each data. Both graphs allow you to compare the different data categories to each other (which one is biggest, smallest, etc.)
