Download Ch. 10 answer key

Chapter 10
Name
Review/Test
4. Write the word that describes the part of Figure A
Online Assessment
and Intervention
C
ray
line
line segment
1. Gavin is designing a kite. He sketched a picture of the kite.
acute angle
EB
Summative Assessment
‹_›
AB
0 right angles
_
line
___
acute angle
∠CGB ___
5. What term best describes the figure shown below?
Right Triangle
B, D
A, E
Personal Math Trainer
6.
3. Select the angles that identify an obtuse triangle. Mark all
that apply.
A
acute, acute, acute
B
acute, acute, obtuse
C
right, acute, acute
D
obtuse, right, acute
Naomi leaves for her trip to Los Angeles on the
12th day of August. Since August is the 8th month, Naomi wrote
the date as shown.
SMARTER
Naomi says all the numbers she wrote have line symmetry. Is she
correct? Explain your thinking.
No; possible explanation: Naomi is incorrect. The number
2 does not have a line of symmetry because if it were cut
out, there would be no way to fold it in half so that the two
parts matched exactly.
Assessment Options
Chapter Test
Chapter 10
Data-Driven Decision Making
Based on the results of the Chapter Review/Test use the
following resources to review skills.
3
2
1
Content Focus
593
594
Chapter 10
Personal
Math Trainer
Item
Lesson
Standard
1
10.1
4.G.A.1
Identify angles as acute, right, or obtuse.
4.G.A.1
R—10.1
2, 3, 7, 15
10.2
4.G.A.2
Classify triangles based on the size of their
angles.
4.G.A.2
R—10.2
4, 14
10.1
4.G.A.1
Identify lines, line segments, rays, and angles.
4.G.A.1
R—10.1
5, 8, 16
10.3
4.G.A.1
Identify lines or sides of figures as either parallel
or perpendicular.
4.G.A.1
R—10.3
6, 17
10.5
4.G.A.3
Determine whether a given two-dimensional
figure has line symmetry.
4.G.A.3
R—10.5
9, 10, 19
10.4
4.G.A.2
Recognize a quadrilateral and classify it into its
appropriate subgroups.
4.G.A.2
R—10.4
11, 13, 20
10.6
4.G.A.3
Determine the number of lines of symmetry for a
given two-dimensional figure.
4.G.A.3
R—10.6
12, 18, 21
10.7
4.OA.C.5
Analyze a shape pattern to determine a missing
term.
4.OA.C.5
R—10.7
Key: R—Reteach (in the Chapter Resources)
593–594
Chapter 10
Intervene with
© Houghton Mifflin Harcourt Publishing Company
• What are the building blocks of
geometry?
• How can you classify triangles
and quadrilaterals?
• How do you recognize symmetry
in a polygon?
right angle
___
F
E
Obtuse Triangle
C, F
© Houghton Mifflin Harcourt Publishing Company
Ask the following questions to
focus students’ thinking:
∠EBG
perpendicular lines
Acute Triangle
Chapter Essential Question
How can you draw and identify
lines and angles, and how can you
classify shapes?
line segment
___
C
B
D
F
D
right angle
_›
ray
GA ___
2. Write the letter of the triangle under its correct classification.
You may want to review with
students the essential question for
the chapter.
B
Figure A
___
A
G
A
How many right angles does the kite appear to have?
Use the Chapter Review/Test
to assess students’ progress in
Chapter 10.
E
written below.
Personal Math Trainer
Chapter 10 Review/Test
Name
11. Match each figure with the correct number of lines of symmetry
it has.
7. Max made a pennant that looks like a triangle. How can you
classify the triangle based upon its angles?
Performance
Assessment Task
F
acute
The triangle is a(n) __
triangle.
•
•
•
•
•
•
•
•
0 lines of
symmetry
1 line of
symmetry
2 lines of
symmetry
More than
2 lines of
symmetry
8. Choose the labels to make a true statement.
A
E
I
G
B
Chapter 10
12. Barb drew the pattern shown.
C
J
H
D
?
‹_›
‹_›
GH
‹_›
CD
‹_›
AB
F
is parallel to
EF
‹_›
CD
‹_›
GH
For each task, you will find
sample student work for each
of the response levels in the
task scoring rubric.
Use the square shown to draw the missing pattern.
.
13. Claudia drew the figure below. Draw a line of symmetry on
Claudia’s figure.
9. Classify the figure. Select all that apply.
quadrilateral
rectangle
trapezoid
rhombus
parallelogram
square
ray
15. How many acute angles does a right triangle have?
© Houghton Mifflin Harcourt Publishing Company
© Houghton Mifflin Harcourt Publishing Company
14. Write the word or words that best describe this figure.
2 acute angles.
A right triangle has _
10. Lily designed a deck in her backyard that looks like a quadrilateral
that has only 1 pair of parallel sides. How can you classify the
figure?
trapezoid .
The quadrilateral is a __
Chapter 10 595
Name
596
Performance
Assessment Tasks may be
used for portfolios.
Be sure to assign
students Exercise 6 in
the Personal Math Trainer. It
features an animation or video
to help students model and
solve the problem.
20. Veronica found the number of lines of symmetry for the figure
below. How many lines of symmetry does it have?
16. Mike drew a figure with opposite sides parallel. Write the pairs of
parallel sides. What figure is it?
D
G
___
___
E
F
___
___
DG is parallel to FE and DE is parallel to GF; the figure is a
parallelogram.
2 lines of symmetry
_
17. Circle the letter that does not have line symmetry.
21.
DEEPER
DOTS
Jordan drew the pattern below.
Figure:
1
2
3
4
18. Joseph made a pattern using ovals and rectangles. The first four figures
of his pattern are shown. Draw the next figure in the pattern.
Part A
Describe the pattern.
Figure 1
Figure 2 Figure 3 Figure 4
Figure 5
Possible description: each figure has 2 more squares than
the preceding figure.
19. Jeremy drew Figure 1 and Louisa drew Figure 2.
Part B
Figure 2
Write a rule using numbers to find the number of squares in any
figure in the pattern.
Part A
© Houghton Mifflin Harcourt Publishing Company
Jeremy says both figures are rectangles. Do you agree with Jeremy?
Support your answer.
Possible rule: multiply the figure number by 2.
Yes; possible answer: both figures have 2 pairs of parallel sides,
opposite sides that are equal in length, and 4 right angles.
Part C
Draw Figure 5.
Part B
Louisa says both figures are rhombuses. Do you agree with Louisa?
Support your answer.
No. Possible answer: figure 2 is a rhombus since it has 2 pairs
of parallel sides and 4 sides of equal length. Figure 1 does not
have 4 sides of equal length so it cannot be a rhombus.
Chapter 10 597
© Houghton Mifflin Harcourt Publishing Company
Figure 1
598
Chapter 10 Review/Test 595–598
Chapter 10 Review/Test
See the Chapter Resources for a
Performance Task that assesses
students’ understanding of the
content of this chapter.