Time periods or blood periods or school periods.
Answer:
Mercator
Explanation:
The Mercator projection is a cylindrical map projection presented by the Flemish geographer and cartographer Gerardus Mercator in 1569. It became the standard map projection for navigation because of its unique property of representing any course of constant bearing as a straight segment.
Answer:
( D )
Explanation:
Because their are actually about 160 of them.
I think it’s A) Volga, I’m sorry if it’s wrong
Grids, and variables are used to find a coordinate.