Geometry Vocabulary_ Lesson 30 & Lesson 31

Lines that are always the same distance apart and never cross.

• perpendicular lines

• line segment

• parallel lines

• lines

A straight row of points that starts at one point and goes on forever in one direction.

• line

• ray

• line segment

• end point

A straight row of points that goes on forever in both directions.

• line segment

• perpendicular lines

• point

• line

A single location in space

• angle

• line

• point

• ray

a geometric shape formed by two rays, lines, or line segments that meet at a common endpoint

• degree

• angle

• line

• perpendicular lines

a straight row of points that starts at one point and ends at another point

• ray

• line

• parallel lines

• line segment

two lines that meet to form a right angle

• perpendicular lines

• parallel lines

• line

• line segment

a unite of measure for angles

• endpoint

• degree

• angle

• vertex

an angle that measures more than 0 degrees but less than 90 degrees

• acute angle

• right angle

• obtuse angle

an angle that measures more than 90 degrees but less than 180 degrees

• right angle

• acute angle

• obtuse angle