the formula for area of a circle came from brahmagupta.
the formula for area of a circle came from brahmagupta.
where did the formula for area of a circle come from?
brahmagupta
Na
Na
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