China Liu Hui Zu Gengzhi Zu Chongzhi Cavalieri's principle sphere area method of exhaustion volume
The method of exhaustion was later discovered independently in China by Liu Hui in the 3rd century AD in order to find the area of a circle. In the 5th century AD, Zu Gengzhi, son of Zu Chongzhi, established a method that would later be called Cavalieri's principle to find the volume of a sphere.
