Geometric Notations and Definitions

Point : NOTATION: Point A, PT A, ADEFINITION: Has no dimension.Represented by a dot

Line : NOTATION: Line ABDEFINITION: Has one dimension.Through any two points, there is exactly one line

Collinear Points : Points that are on the same line.

Coplanar Points : Points that are on the same plane.

Equal to : NOTATION: =DEFINITION:Applies to lengths and angle measures.

Congruent : NOTATION: ≅DEFINITION:Has the same measure.Applies to segments and angles.

Congruent Segments : Line segments that have the same length.A tick mark is used on each segment to show that they are congruent.

Segment Addition Postulate : If Point B is between A and C, then AB + BC = AC

Angle Addition Postulate : The sum of two adjacent angle measures is equal to the measure of the larger angle.

Angle Bisector : A ray that divides an angle into two congruent angles.