The circumference of a circle = \(\pi d\) or \(2\pi r\). Look at the sector of the circle shown below. To calculate the length of the arc, we need to know what fraction of the circle is shown.

A chord separates the circumference of a circle into two sections - the major arc and the minor arc. It also separates the area into two segments - the major segment and the minor segment.

Two newly discovered stone circles, built about 5,000 years ago in what is now the southwest of England, are the latest to show that Stonehenge was not the only Stone Age circle built in the region.

His “sacred arc” theory led him to a discovery termed the Sittaford stone circle in 2007. Building on this idea, he looked for other related Stone Age locations. “I first identified the ...

His “sacred arc” theory led him to a discovery termed the Sittaford stone circle in 2007. Building on this idea, he looked for other related Stone Age locations. “I first identified the ...