# Parallel And Perpendicular Lines Worksheet Page 21

47.
CRITICAL THINKING
The line containing the point (5
2t,
3
t) can be
described by the equations x
5
2t and y
3
t. Write the slope-intercept
form of the equation of this line.
WRITING IN MATH
Answer the question that was posed at the beginning of
48.
the lesson.
How is slope used in transportation?
• an explanation of why it is important to display the grade of a road, and
• an example of slope used in transportation other than roads.
Standardized
49. Find the slope of a line perpendicular to the line containing ( 5, 1) and
Test Practice
( 3,
2).
2
3
2
3
A
B
C
D
3
2
3
2
ALGEBRA
50.
The winning sailboat completed a 24-mile race at an average speed
of 9 miles per hour. The second-place boat finished with an average speed of
8 miles per hour. How many minutes longer than the winner did the second-
place boat take to finish the race?
A
20 min
B
33 min
C
60 min
D
120 min
Mixed Review
In the figure, QR TS, QT RS, and m 1
131.
1
Q
Find the measure of each angle.
(Lesson 3-2)
2
5
51.
6
52.
7
3
T
R
6
53.
4
54.
2
4
7
55.
5
56.
8
S
8
State the transversal that forms each pair of angles. Then
identify the special name for each angle pair.
p
(Lesson 3-1)
1
2
3
4
57.
1 and
14
58.
2 and
10
5
6
7
8
q
59.
3 and
6
60.
14 and
15
9 10
11
12
13 14
15
16
61.
7 and
12
62.
9 and
11
m
Make a conjecture based on the given information. Draw
a figure to illustrate your conjecture.
(Lesson 2-1)
63. Points H, I, and J are each located on different sides of a triangle.
64. Collinear points X, Y, and Z; Z is between X and Y.
65. R(3,
4), S( 2,
4), and T(0,
4)
A
D
Classify each angle as right, acute, or obtuse.
(Lesson 1-4)
B
66.
ABD
67.
DBF
E
68.
CBE
69.
ABF
F
C
PREREQUISITE SKILL
Solve each equation for y.
the Next Lesson
(To review solving equations, see pages 737 and 738.)
y
70. 2x
7
71. 2x
4y
5
72. 5x
2y
4
0
144 Chapter 3 Parallel and Perpendicular Lines