I had never heard the term, “math circle,” until a few weeks ago when I stumbled across an article in The Atlantic about the growing number of American kids excelling in the highest levels of ...

Save guides, add subjects and pick up where you left off with your BBC account. The circumference of a circle = \(\pi d\) or \(2\pi r\). Look at the sector of the circle shown below. To calculate ...

Practice circle geometry ahead of your National 5 Maths exam with this interactive maths quiz. Looking for more on circle geometry? Check out our National 5 Maths guide. National 5 Maths circle ...