# Worksheet: Parallel, Perpendicular, and Intersecting Lines

In this worksheet, we will practice classifying pairs of lines, rays, or line segments as parallel, perpendicular, or intersecting and using the correct notation to denote the relationship between lines.

Q1:

Which of the following correctly defines perpendicular lines?

• ATwo lines are said to be perpendicular if they meet at a reflex angle.
• BTwo lines are said to be perpendicular if they never intersect however far they are extended.
• CTwo lines are said to be perpendicular if they meet at an acute angle.
• DTwo lines are said to be perpendicular if they meet at an obtuse angle.
• ETwo lines are said to be perpendicular if they meet at right angles.

Q2:

Determine the colors of the lines that are perpendicular to each other. • Ablue and black
• Bblue and yellow
• Cblack and yellow

Q3:

Which are the parallel lines in the figure? • A and
• B and
• C and

Q4:

Use or to fill in the gap: . • A
• B

Q5:

Is parallel or perpendicular to ? • Aparallel
• Bperpendicular

Q6:

Is parallel or perpendicular to ? • Aparallel
• Bperpendicular

Q7:

State whether the following is true or false: Any angle formed from the intersection of two perpendicular straight lines is a right angle.

• Atrue
• Bfalse

Q8:

The blue car is driving on a road that is the road that the yellow car is driving on. • Aintersecting
• Bperpendicular to
• Cparallel to

Q9:

The blue car is driving on a road that is to the road that the yellow car is driving on. • Aparallel
• Bperpendicular

Q10:

Are horizontal straight lines parallel?

• Atrue
• Bfalse

Q11:

What is the relation between the two straight lines? • Aintersecting and not perpendicular
• Bparallel
• Cperpendicular

Q12:

In the following figure, what is the relation between and ? • AParallel
• Bperpendicular

Q13:

Which of the following segments is perpendicular to ? • A
• B
• C
• D

Q14:

Determine whether the following sentence is true or false: Any two parallel lines may intersect if they are extended.

• Atrue
• Bfalse

Q15:

Which of the following shapes has only three sets of parallel lines? • A(b)
• B(c)
• C(d)
• D(a)
• E(e)

Q16:

Complete the following: Two parallel lines are two lines that .

• Aare perpendicular
• Bintersect but do not lie in the same plane
• Clie in the same plane and do not have a common point
• Dlie in the same plane and have a common point
• Edo not lie in the same plane and do not intersect

Q17:

Which of the following letters has parallel lines: Y, F, A, L?

• AF
• BA
• CY
• DL

Q18:

Can two parallel straight lines intersect?

• ANo
• BYes

Q19:

How many points of intersection do two parallel lines have?

Q20:

Are vertical straight lines parallel?

• Ano
• Byes

Q21:

Determine whether the following sentence is true or false: Two lines that are perpendicular to the same line must intersect.

• Atrue
• Bfalse

Q22:

What does this picture show? • Aparallel line segments
• Bintersecting lines
• Cintersecting rays
• Dintersecting line segments
• Eperpendicular lines

Q23:

State whether the following statement is true or false: If two lines are parallel, they do not intersect.

• Atrue
• Bfalse

Q24:

What do we call two lines that intersect in a point and meet at right angles?

• Aintersecting and not perpendicular
• Bperpendicular
• Cparallel

Q25:

If one of the angles at the point of intersection between two lines is acute, what can you say about the two lines?

• AThey are neither parallel nor perpendicular.
• BThey are perpendicular.
• CThey are parallel.