1.1 Vocabulary (Honors)

Point

Point

a location that has no size

Line

An infinite number of points on a straight path that extends in two opposite directions with no end and has no thickness.

Line Segment

A portion of a line with two endpoints.

Ray

A part of a line that has one endpoint and extends indefinitely in one direction.

Angle

Formed by two rays with the same endpoint. Each ray is a side of the angle and the common endpoint is the vertex of the angle.

Collinear Points

Points that lie on the same line.

Line BC (Visual/Notation)

Ray FG (Visual/Notation)

Segment DE (Visual/Notation)

Segment GH (Notation)

Ray JK (Notation)

Angle ABC (Visual/Notation)

Congruent Segments

the segments are of equal length

Congruent Angles

angle with equal angle measure

Segment Addition Postulate

States if point B is between points A and C on the same line, then AB + BC = AC

Angle Addition Postulate

If point D is in the interior of <ABC, then the m<ABD + m<DBC = m<ABC

Plane

A flat surface that extends without without end that has no thickness

Opposite Rays

two rays that have a common endpoint and form a line