The border between the United States and Canada lies at the latitudes of ————-degrees north .The ——————— is located at 0 degrees latitude and passes through the nation of ——————-.The —————- is located at 0 degrees longitude and passes through——————.

1) 49th parallel

2) Equator; Brazil

3) Prime Meridian; Greenwich, England

Explanation:

49th parallel north is the latitude that divides US and Canada. The treaty of Oregon was signed by Great Britain and US on June 15, 1846, it ended the joint occupancy of the Pacific Northwest and 49th parallel was accepted as the border between Canada and US. Zero Degree meridian is called Prime meridian, all other lines of longitudes are calculated from it, it passes through Greenwich.  Equator divides Earth into two halves. It is an imaginary line having a total length of 40,075 kilometres