Both are imaginary lines on the Earth's surface related to navigation
and cartography. Aside from that, very little if anything.
Africa
Africa.
Africa, along with the Tropic of Capricorn and the Prime Meridian.
Africa.
Africa.
The South Atlantic Ocean, west of Namibia.
The Prime Meridian crosses the Tropic of Cancer in southwestern Algeria about 150 miles east of Mali in Africa.
Each of those lines crosses some part of Africa.
Arctic Circle, Tropic of Cancer, Equator, Tropic of Capricorn, Antartica Circle, Prime Meridian
Tropic of Cancer: America Africa and Asia Tropic of Capricorn: America Africa Oceania The Prime Meridian Europe Africa Antartica The Equator : America Africa Asia/ Oceania
All of those markers cross Africa.
All four pass through Africa.