Which state is located at 45 degrees north latitude and 90 degrees west longitude?

Answer 1

The parallel of 45 degrees north latitude crosses territory in . . .

-- Oregon

-- Idaho

-- Montana

-- Wyoming

-- South Dakota

-- Minnesota

-- Wisconsin

-- Michigan

-- New York

-- Vermont

-- New Hampshire

-- Maine.

Having a longitude along with the latitude serves to narrow it down considerably.

Answer 2

Moving from the West Coast to the east, the 45° parallel passes through Oregon, Idaho, Montana, the northern border of Wyoming, South Dakota, Minnesota, Wisconsin, Michigan, the Canadian borders of New York and Vermont, the tip of New Hampshire, and Maine.
-- Oregon

-- Idaho

-- Montana

-- Wyoming

-- South Dakota

-- Minnesota

-- Wisconsin

-- Michigan

-- New York

-- Vermont

-- New Hampshire

-- Maine

Answer 3

-- Oregon

-- Idaho

-- Montana

-- Wyoming

-- South Dakota

-- Minnesota

-- Wisconsin

-- Michigan

-- New York

-- Vermont

-- New Hampshire

-- Maine

Answer 4

Louisiana

Answer 5

Wisconsin.