Geometry vocab quiz 1

k

If points are on the same line, we call them ___________ points

collinear

If points are on the same plane we call them __________ points

coplanar

Part of a line between 2 endpoints

• notation is a line above the letters

segment

part of a line that has an endpoint and goes forever in one direction

Ray

two rays that have the same endpoint but extend in the opposite direction

opposite rays

two rays with the same endpoint(vertex)

angle

is an angle that measutres between 0 degrees-90 degrees

Acute angle

is an angle that measures between 9-180 degrees

obtuse angles

is an angle that measures 90 degrees

right angle

is an angle that measures 0 degrees

zero angle

an angle that measures180 degrees

straight angle

is an angle that measures between 180-360 degrees

reflex angle

when two lines cross at exactly one point

intersecting lines

when 3 or more lines intersect at exacttly one point

concurrent lines

when there are two lines in the same plane that never intersect

parallel lines

when two lines intersect at a right angle

perpendicular line

two angles that have the sum of 180 degrees

supplementary angles

Two angles that have a sum of 90 degrees

complementary angles

two angles formed when two lines intersect that are opposite each other

vertical angles

Two angles that share a common vertex and a common ray (side)

adjacent angles

A location in space

point

angles that have the same measure

Congruent angles

A flat surface that extends in all directions forever

plane

a straight path of points extending in both directions forever

line

adjacent angles that are called a ________________ and together the angles form a straight angle that = 180 degrees

linear pair

is two lines that do not intersect and not parallel. The lines are on different planes

skew lines