No. It would be the western boundary.
East longitude is measured starting from the Prime Meridian and increasing eastward.
It reaches the maximum of 180° east in the vicinity of the International Date Line.
The Prime Meridian and its opposite the 180th meridian (at 180° longitude), which the International Date Line generally follows, form a great circle that divides the Earth into the Eastern and Western Hemispheres.
The Equator devides the earth in to North and South hemispheres
International dateline
International dateline
The prime meridian at longitude 0° marks the eastern boundary of the Western Hemisphere The corresponding anti-meridian at Longitude 180° marks the western boundary of the Western Hemisphere. (In practical terms you could also consider the international date line to be the boundary - just not the official boundary.)
The eastern as the prime meidian is to the west and the international dateline is to the east.
A hemisphere is a section of the Earth located north/south or between two major lines of latitude or longitude. The Northern Hemisphere is located north of the Equator. The Southern Hemisphere is located south of the Equator. The Western Hemisphere is located west of the Prime Meridian and east of the International Dateline. The Eastern Hemisphere is located east of the Prime Meridian and west of the International Dateline.
The eastern state boundary of Idaho is at 111.05° west longitude. That's 11° west of 100° west longitude, and 149° east of 100° east longitude. The state's western boundary is 5.96° west of there.
Believe it or not it is Alaska. Alaska is the most northern, most eastern, and most western state. Hawaii is the most southern. Alaska divides the eastern and western hemisphere at the International Dateline or End Meridian (180 degrees longitude), making it qualify for east and west. The Prime meridiam (0 degrees longitude) is located in Greenwich England.
The Prime or Greenwich Meridian at 0 degrees.
The globe is divided into the northern and southern hemisphere (divide by the equator) , and the eastern and western hemisphere (divided by the International Dateline).
The Prime Meridian is part of the boundary between the eastern and western hemispheres. The International Date Line is the rest of the boundary.