They are the same thing, so it really doesn't matter. I usually say graph, but whatever is easiest to you.
not a pie graph or pie chart
pie chart
It's a Pie graph or Pie Chart are two other common names for a circle graph.
pie chart graph
Bar chart or pie chart.
A pier chart is used to compare relative parts of a whole.
not a pie graph or pie chart
A pie chart.
Yes, a circle graph and a pie chart are the same thing
bar graph
A pie chart, a cake slice chart.
yes
pie chart
Yes.
pie chart
Pie chart, of course!!
A Pie Chart or Circle Graph