16 terms

Endpoint

the point at the end of a segment or the starting point of a ray

Angle

a figure formed by two rays with a common endpoint

Segment

a part of a line consisting of two endpoints and all the points between them

Collinear

two or more points that lie on the same line

Linear Pair

two adjacent angles that are supplementary

Midpoint

a point that divides a segment into two congruent segments

Congruent

figures that have the same size and shape

Complementary angles

two angles whose measures have a sum of 90 degrees

Supplementary angles

two angles whose measures have a sum of 180 degrees

Vertical Angles

two angles that are opposite one another and have the same measure

ray

part of a line which has one endpoint and extends indefinitely in one direction

Parallel lines

coplanar lines that do not intersect

Perpendicular lines

lines that intersect to form right angles

Skew lines

non-coplanar lines that do not intersect

Similar Figures

figures whose angles are congruent and sides are proportional

Angle Bisector

a line that divides an angle into two congruent angles