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.
The so-called angle of incidence is the angle between the chord line of the wing at the fuselage and the fuselageâs longitudinal axis. Now, this sounds as if it ought to matter, because after all, if the wing is not at the correct angle it will not have enough lift, or will have too much, and the airplane will mush, or plow, or otherwise behave inappropriately.