GeometryGuided NotesPoints, Lines & PlanesStandard: Geo.M.G.CO.A.01 - I will be able to define an angle, circle, perpendicular lines, parallel lines, and line segments using the definition of apoint, and the distance along a line and a curve.A point has no dimension. It looks AA lineextends in one direction. It looks like ABA plane extends in two dimensions. It looks like These terms are considered undefinedtermsbecause they don’t have a formal definition, they are agreed on to be this way.Terms that can be described using known words, such as Point or Line are known as definedterms.CollinearPointsare points that lie on the same line. A BCCoplanarPointsare points that lie on the same plane.A linesegmentis part of a line that consists of twopoints called endpoints.BAA rayis part of a line that consists of a point called an initial point, and all points on the line extend in one direction.BA

If C is between A and B on AB then CA and CB are oppositerays.A CNote: AB and BA are the same.B