Who determined formulas to calculate the surface area and volume of a sphere

Was discovered over 2,000 years ago by the Greek philosopher Archemedes.

It developed as a reaction to the impact of european colonialism in africa on peoples of african descent. in the  mid-20th century, activists in africa adopted pan-africanism as a rallying cry for independence from colonial rule. some african pan-africanists sought to unite the continent as one independenthope it was useful