The 100th meridian west is a line of longitude that is located 100 degrees west of the Prime Meridian, which is the line of longitude defined as 0 degrees. The 100th meridian west runs from the North Pole to the South Pole and passes through several U.S. states, including Montana, Wyoming, Colorado, Nebraska, and Texas. Historically, the 100th meridian west has been significant in various contexts, particularly in relation to agriculture and climatology.

The 109th meridian east is a line of longitude that is 109 degrees east of the Prime Meridian, which is designated as 0 degrees longitude. It runs from the North Pole to the South Pole and passes through several countries, including Mongolia, China, India, and various nations in Southeast Asia. In the context of geography, the 109th meridian east is used as a reference point for navigation, mapping, and geographic information systems.

The 114th meridian east is a line of longitude that is located 114 degrees east of the Prime Meridian, which is designated as 0 degrees longitude. This meridian runs from the North Pole to the South Pole and passes through several countries and regions, including parts of eastern Asia, such as Mongolia and China, as well as regions in the Pacific Ocean.

The 43rd meridian east is a line of longitude that is 43 degrees east of the Prime Meridian. It runs from the North Pole to the South Pole and passes through several countries and regions. In the northern hemisphere, the 43rd meridian east passes through parts of Eastern Europe and Russia. Specifically, it traverses countries such as Ukraine, Belarus, and some regions of Russia.

The Heronian mean is a mathematical mean that is defined for two positive numbers \( a \) and \( b \). It is given by the formula: \[ H(a, b) = \frac{a + b + \sqrt{ab}}{3} \] The Heronian mean can be viewed as a blend of the arithmetic mean and the geometric mean. It is particularly interesting because it shares properties with both of these means.

The 11th meridian west is a line of longitude that is 11 degrees west of the Prime Meridian, which is defined as 0 degrees longitude. This meridian runs from the North Pole to the South Pole and passes through various countries and regions. In terms of geographical location, the 11th meridian west passes through the following areas: - It crosses western parts of Norway. - It continues through the northern part of the Atlantic Ocean.

The 126th meridian west is a line of longitude that is 126 degrees west of the Prime Meridian, which is designated at 0 degrees longitude. This meridian runs from the North Pole to the South Pole and passes through several regions in North America, including parts of Canada and the United States. In the United States, the 126th meridian west primarily runs through the state of Alaska, where it crosses the Aleutian Islands.

The 12th meridian west is a line of longitude that runs from the North Pole to the South Pole, situated 12 degrees west of the Prime Meridian, which is at 0 degrees longitude. It passes through several countries in Europe and Africa, including parts of Norway, Sweden, Denmark, Germany, and others. In geographical terms, meridians are used to specify the east-west position of a point on the Earth's surface.

The 139th meridian west is a line of longitude that is 139 degrees west of the Prime Meridian, which passes through Greenwich, England. This meridian runs from the North Pole to the South Pole and crosses various land and water areas. In the northern hemisphere, the 139th meridian west passes through parts of Canada, including some areas of British Columbia and the Yukon Territory. In the southern hemisphere, it crosses through the Pacific Ocean and then reaches parts of Antarctica.

The 141st meridian east is a line of longitude that is 141 degrees east of the Prime Meridian, which is situated at 0 degrees longitude. This meridian runs from the North Pole to the South Pole, passing through various countries and regions. In the Northern Hemisphere, the 141st meridian east crosses through parts of Russia, the Pacific Ocean, and some islands, including those of Japan. In the Southern Hemisphere, it primarily runs through the ocean.

The 39th meridian east is a line of longitude that is 39 degrees east of the prime meridian, which is located at 0 degrees longitude. It runs from the North Pole to the South Pole and passes through several countries, including parts of Russia, Ukraine, Romania, and various countries in East Africa. Meridians are used in geographic coordinate systems to specify locations on the Earth's surface in conjunction with lines of latitude.

The 153rd meridian east is a line of longitude that is located 153 degrees east of the Prime Meridian, which is defined as 0 degrees longitude. Meridians run from the North Pole to the South Pole and are used to specify locations on the Earth's surface in combination with lines of latitude. The 153rd meridian east passes through several regions and countries, including parts of the Pacific Ocean and the eastern coast of Australia.

The 16th meridian east is a line of longitude that is located 16 degrees east of the Prime Meridian, which is designated as 0 degrees longitude. It runs from the North Pole to the South Pole and passes through several countries in Europe and Africa. In Europe, the 16th meridian east passes through countries including Norway (in the northern part), Sweden, Denmark, Germany, and Austria.

The 170th meridian east is a longitudinal line that is 170 degrees east of the Prime Meridian, which is located at 0 degrees longitude. This meridian runs from the North Pole to the South Pole and passes through several regions, including parts of the Pacific Ocean and some islands. Notably, the 170th meridian east lies just west of the International Date Line, which is at approximately 180 degrees longitude.

The 31st meridian west is a line of longitude that is 31 degrees west of the Prime Meridian, which runs through Greenwich, London. It is an imaginary vertical line that extends from the North Pole to the South Pole. Geographically, this meridian passes through several countries in Africa, including parts of Algeria, Libya, and more. It is often used in various geographic, navigational, and mapping contexts to define locations and boundaries.

The 47th meridian east is a line of longitude that is 47 degrees east of the Prime Meridian, which is located at 0 degrees longitude. This meridian runs from the North Pole to the South Pole, passing through several countries. In the northern hemisphere, it traverses regions in countries such as Russia, and in the southern hemisphere, it passes through countries including Kazakhstan and may also touch parts of the Indian Ocean.

The 49th meridian west is a line of longitude that is located 49 degrees west of the Prime Meridian, which is the reference line for 0 degrees longitude. This meridian runs from the North Pole to the South Pole, passing through various countries and regions. In North America, the 49th meridian west serves as a significant boundary between the United States and Canada in several areas.

The 62nd meridian west is a line of longitude that is 62 degrees west of the Prime Meridian, which is located at 0 degrees longitude. It runs from the North Pole to the South Pole, crossing various countries and regions in the Western Hemisphere. In the Northern Hemisphere, the 62nd meridian west crosses parts of Canada, particularly in the provinces of Newfoundland and Labrador, as well as Quebec.

The 5th meridian west is a line of longitude that is located 5 degrees west of the Prime Meridian, which is designated as 0 degrees longitude. It runs from the North Pole to the South Pole and passes through various countries. In terms of geographical coverage, the 5th meridian west passes through several countries in Europe and Africa.

The 61st meridian west is a line of longitude located 61 degrees west of the Prime Meridian, which is the line of longitude defined as 0 degrees. This meridian runs from the North Pole to the South Pole, passing through several countries in the Americas, particularly Canada and the United States. In Canada, it crosses regions of Newfoundland and Labrador, and in the United States, it passes through parts of the state of Maine.