To celebrate World Wetlands Day, the Ministry of Environment and Tourism held a joint launch of the wetlands and ecotourism promotional material and biome posters as a demonstration of the country's commitment to wetlands and water con servation.
Surface: Perpendicularity is a fairly common symbol that requires the referenced surface or line to be perpendicular or 90Â° from a datum surface or line. Perpendicularity can reference a 2D line, but more commonly it describes the orientation of one surface plane perpendicular to another datum plane.urface: Perpendicularity is a fairly common symbol that requires the referenced surface or line to be perpendicular or 90Â° from a datum surface or line. Perpendicularity can reference a 2D line, but more commonly it describes the orientation of one surface plane perpendicular to another datum plane.
perpendicular. 1  at right angles to a given plane or line. 2  exactly upright; vertical; straight up or down. 3  very steep. 4  of or designating the third and latest style of English Gothic architecture of the 14th to the 16th cent., characterized by vertical lines in its tracery.oun. 1  Mathematics A line or plane perpendicular to a given line or plane. 2  A perpendicular position. 3  A device, such as a plumb line, that is used in marking the vertical from a given point.