Question

Plz help with 3 and 4!

Answer 1

1)  The Equator is located (defined) as being at zero degrees north latitude. 
The North Pole is located at 90 degrees north latitude. 
Therefore, half of the distance from the equator to the north pole would be the line of latitude at 45 degrees north. 
This would be quite close to the latitude of Montreal, Quebec, Canada at 45 degrees 30 minutes north latitude. 

2) The Prime Meridian is defined as being zero degrees west (or east) longitude. 
80 degrees west longitude would be quite close to Pittsburgh, Pennsylvania which is located at 79 degrees 57 minutes west of Greenwich, England. 
The halfway line of longitude would be 40 degrees west longitude. 
The city of Rio De Janeiro, Brazil is located approximately 43 degrees west longitude.