The radius of the first circle is shown as 3cm. They then increase by 2cm each time: 5cm → 7cm → 9cm → 11cm. So, the radius of the largest circle is 11cm.

The shafts combine to form a circle more than two kilometers (1.2 miles) in diameter, archaeologists from the University of St Andrew’s said. The monument is most likely Neolithic and was ...

These shafts form a circle more than 2 kilometres in diameter and enclose an area greater than 3 square kilometres around the Durrington Walls henge, one of Britain's largest henge monuments, and ...

Defined as the ratio of the circumference of a circle to its diameter, pi, or in symbol form, π, seems a simple enough concept.But it turns out to be an "irrational number," meaning its exact ...

With apologies to 1990s alt-rock fans, a perfect circle cannot exist outside the realm of mathematics. From subatomic particles to carefully built structures, nothing in the physical world passes ...

The shafts combine to form a circle more than two kilometers (1.2 miles) in diameter, archaeologists from the University of St Andrew’s said. The monument is most likely Neolithic and was ...