prime meridian is the major longitude that is marked 0°,this is also known as green which meridian. in Africa it passes through the lawn of Accra in Ghana. These are three major lines of latitude passing through Africa, these are Equator, tropical of cancer,tropical of capricorn. Equator passing through Somalia,Kenya,Uganda,Congo,D.R.C,Gabon, Tropic of Cancer lies at 23 1/2 North of equator it passes through western Sahara,mustania,Mali,Algeria,Libya,Egypt, and the Tropic of Capricorn lies at 23 1/2 South of equator passing through Namibia, Biswana, South Africa, Mozambique, and Madagascar.