Circumference \(= \pi \times 6 = 18.8~\text ... 4 \pi r^2\) is given on the formula sheet A hemisphere is half of a sphere. The volume can be found by calculating the volume of the whole sphere ...

This year, the solstice occurs in the Northern Hemisphere on June 21 at 4:38am ... and in turn to measure the circumference of the Earth. The measurements at Barapullah were done for the third ...