Geometry Vocabulary

An exact point in space

• point

• line

• line segment

• ray

a straight path that goes on and on in both directions

• point

• line segment

• line

• ray

a part of a line with two endpoints

• line

• ray

• point

• line segment

has one endpoint and extends without end in one direction

• line

• ray

• line segment

• point

lines that pass through each other and make square corners

• intersecting lines

• congruent lines

• straight lines

• perpendicular lines

lines that never intersect

• parallel lines

• perpendicular lines

• intersecting lines

• straight lines

lines that pass through the same point

• intersecting lines

• straight lines

• perpendicular lines

• parallel lines

formed when two rays or line segments share an endpoint

• point

• vertex

• ray

• angle

the point on an angle where two rays or line segments meet

• point

• vertex

• ray

• angle

forms a straight line; it equals 180 degrees

• straight angle

• acute angle

• obtuse angle

• right angle