the formula for area of a circle came from viewing the circle as the limit of a sequence of regular polygons.
the formula for area of a circle came from viewing the circle as the limit of a sequence of regular polygons.
where and from who did the formula for area of a circle come from?
viewing the circle as the limit of a sequence of regular polygons
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the stones themselves are small: on average they measure 10 cm (4 inches) in height, 30 cm (one foot) in width, and 10 cm (4 inches) in depth. the largest protrudes about 0.5 metres (1 foot 8 inches) from the ground. most are incomplete, and likely have been broken since the original erection of the circle. it is not known if all the stones in the circle come from the same natural rock, but a sample from one stone was examined and found to be a hard, pale grey gritstone, likely taken from the nearby pickwell down grits. there are conspicuous quartz veins in many of the circle's stones.
withypool stone circle