Name
Student Worksheet
Date:
Length of Horizontal and Vertical Line Segments
Form EP
Tell the length of each line segment.
y
y
7
6
5
4
3
2
1
A
7
6
5
4
3
2
1
B
x
0
0 1 2 3 4 5 6 7 8 9
Choose the best answer. Mark the bubble.
y
How long is line
7
segment MN?
6
A
B
C
D
4 units
6 units
9 units
14 units
5
4
3
2
1
M
T
S
x
0
0 1 2 3 4 5 6 7 8 9
Explain why each choice is right or wrong.
N
x
0
0 1 2 3 4 5 6 7 8 9 10
How long is line y
segment ST?
7
S
6
A
B
C
D
1
5
6
7
unit
units
units
units
5
4
3
2
1
T
x
0
0 1 2 3 4 5 6 7 8 9 10
4
Diagnostic Assessment Workbook • Form EP
©CSL Associates, Inc. All rights reserved.
Reproducible Student Page
page 54
Item Analysis • Evaluate Students’ Thinking
Have students work each exercise independently. Then have
them share their answers and explain their thinking.
Standards:
MG 2.2
MG 2.3
Follow-Up
Intervention Homework
Library
Pages
Answer: 5 units
Ask:
How do you know if a line segment is horizontal? [The y-coordinates of
the ordered pairs for the segment are the same.]
P: 45–48
179–182
What coordinates do you use to find the length of a horizontal line
segment? [the x-coordinates]
What are the x-coordinates? [8 and 3]
What operation do you use? [Subtraction]
What is 8 3? [5]
How long is segment AB? [6 units]
Answer: 5 units
Ask:
How do you know if a line segment is vertical? [The x-coordinates of the
ordered pairs for the segment are the same.]
What coordinates do you use to find the length of a vertical line
segment? [the y-coordinates]
Follow the same line of questioning as above using the y-coordinates.
Multiple–Choice Strategies
Have students explain why each choice is right or wrong.
Standards:
MG 2.2
MG 2.3
Choice A is wrong. 10 4 6, not 2.
Choice B is correct. Subtract the x-coordinates.
Choice C is wrong. 10 4 6, not 5.
Choice D is wrong. 10 4 6, not 14.
Choice A is wrong. 6 0 6, not 1.
Choice B is wrong. 6 0 6, not 2.
Choice C is correct. Subtract the y-coordinates.
Choice D is wrong. 6 7 is not equal to 3.
Diagnostic Assessment Workbook • Form EP
page T-54
Teacher’s Guide and Answer Key
©CSL Associates, Inc. All rights reserved.
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