The meaning of Erastus is Lovely and  Beloved. Its origin is Variant of the Greek name Erastos. Erastus is a form of Erastos and is generally pronounced like eh RAS tus. This name is mostly being used as a boys name. Last year it ranked 4,160th in the U.S. Social Security Administration list of most popular baby boy names.
Which undefined term is needed to define an angle? Plane Point Ray Line. Undefined, you need a line to define an angle (if you're looking for undefined terms). This is because, if you think about it, a ray is part of a line.
Image by Flickr.com, courtesy of Manitoba Historical Maps. Hachure marks are defined as multiple crossing lines that create a shaded definition on either maps or drawings. In topography, they are used to define surface relief.They are also known as âtick marks..losed Depressions. Craters and sinkholes are examples of closed depressions. They are shown by using roughly circular contour lines that have Hachure marks inside that run perpendicular to the downhill side of the depression.