Million. ('thousand thousand')
If you mean square units within a circle then it is:- Area = pi*radius squared
Yes. The circles can be of different size. These are called concentric circles.
A cylinder has two circles as its bases.
concentric circles
by running in circles
Track is running in circles and cross country is just running.
It's not an idiom because you can figure out the meaning if you think - if you're running around in circles, you're not getting anywhere. It's a metaphor for fruitless work.
Maybe bc he is running circles around you.
Lambs may run in circles out of playfulness or to release pent-up energy. It could also be a form of exercise or a way to explore their surroundings. In some cases, running in circles could indicate stress or discomfort.
Silver Circles by Telescope.
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to turn around in circles
"They are circles."
Nothing
drawing Circles
You are undecided about something.