few_shots: Example:
Problem/activity:
Narrative
The purpose of this activity is for students to create composite shapes and compose new shapes from composite shapes. For example, students may find that a rectangular prism can be made from four triangular prisms or from eight smaller cubes. Students then discover that they can combine two of the composed rectangular prisms to make a new rectangular prism.
Required Materials
Materials to Gather
Geoblocks
Launch
Groups of 4
Give each group geoblocks.
Display a large cube.
“This cube can be built from other shapes. See how many ways you can build a cube using other shapes.”
3 minutes: partner work time
Share responses.
Activity
“Choose a different shape. Try to find smaller shapes you can use to build that shape.”
5 minutes: partner work time
Student Response
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click here to register or sign in
for free access to Student Response.
Activity Synthesis
Display a cube and a composite cube—for example, a cube composed of four small cubes and one rectangular prism.
Demonstrate putting the shapes together.
“What new shape did I make with the cube and the cube I made?”
“Put your shapes together to make a rectangular prism.”
Display a rectangular prism and two triangular prisms.
“Find these shapes. Put them together. What new shape can you make?” (a cube, a rectangular block)


Standard options: 
A. Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.
B. Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes to possess defining attributes.
C. Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape. (Students do not need to learn formal names such as “right rectangular prism.”)


Your response:
C

Now, assign the following problem or activity to one or more relevant standards it aligns with.
shot_info: im_lesson_009431

1
options: Use facts about supplementary, complementary, vertical, and adjacent angles in a multi-step problem to write and solve simple equations for an unknown angle in a figure.

Solve real-world and mathematical problems involving area, volume and surface area of two- and three-dimensional objects composed of triangles, quadrilaterals, polygons, cubes, and right prisms.

Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.
problem_activity: Warm-up
By now, students understand that lengths in a scaled copy are related to the original lengths by the scale factor. Here they see that the area of a scaled copy is related to the original area by the
square
of the scale factor.
Students build scaled copies of a single pattern block, using blocks of the same shape to do so. They determine how many blocks are needed to create a copy at each specified scale factor. Each pattern block serves as an informal unit of area. Because each original shape has an area of 1 block, the
\(\text{(scale factor)}^2\)
pattern for the area of a scaled copy is easier to recognize.
Students use the same set of scale factors to build copies of three different shapes (a rhombus, a triangle, and a hexagon). They notice regularity in their repeated reasoning and use their observations to predict the number of blocks needed to build other scaled copies (MP8).
Digital
Launch
Arrange students in groups of 3–4. Distribute pattern blocks and ask students to use them to build scaled copies of each shape as described in the task. Each group would need at most 16 blocks each of the green triangle, the blue rhombus, and the red trapezoid. If there are not enough for each group to have a full set with 16 each of the green, blue, and red blocks, consider rotating the blocks of each color through the groups, or having students start with 10 blocks of each and ask for more as needed.
Give students 6–7 minutes to collaborate on the task and follow with a whole-class discussion. Make sure all students understand that “twice as long” means “2 times as long.”
Using real pattern blocks is preferred, but the Digital Activity can replace the manipulatives if they are unavailable.
Student Facing
Use the applets to explore the pattern blocks. Work with your group to build the scaled copies described in each question.
[IMG]
How many blue rhombus blocks does it take to build a scaled copy of Figure A:
Where each side is twice as long?
Where each side is 3 times as long?
Where each side is 4 times as long?
How many green triangle blocks does it take to build a scaled copy of Figure B:
Where each side is twice as long?
Where each side is 3 times as long?
Using a scale factor of 4?
How many red trapezoid blocks does it take to build a scaled copy of Figure C:
Using a scale factor of 2?
Using a scale factor of 3?
Using a scale factor of 4?
Make a prediction: How many blocks would it take to build scaled copies of these shapes using a scale factor of 5? Using a scale factor of 6? Be prepared to explain your reasoning.
Student Response
Teachers with a valid work email address can
click here to register or sign in
for free access to Student Response.
Print
Launch
Arrange students in groups of 3–4. Distribute pattern blocks and ask students to use them to build scaled copies of each shape as described in the task. Each group would need at most 16 blocks each of the green triangle, the blue rhombus, and the red trapezoid. If there are not enough for each group to have a full set with 16 each of the green, blue, and red blocks, consider rotating the blocks of each color through the groups, or having students start with 10 blocks of each and ask for more as needed.
Give students 6–7 minutes to collaborate on the task and follow with a whole-class discussion. Make sure all students understand that “twice as long” means “2 times as long.”
Using real pattern blocks is preferred, but the Digital Activity can replace the manipulatives if they are unavailable.
Student Facing
Your teacher will give you some pattern blocks. Work with your group to build the scaled copies described in each question.
[IMG]
How many blue rhombus blocks does it take to build a scaled copy of Figure A:
Where each side is twice as long?
Where each side is 3 times as long?
Where each side is 4 times as long?
How many green triangle blocks does it take to build a scaled copy of Figure B:
Where each side is twice as long?
Where each side is 3 times as long?
Using a scale factor of 4?
How many red trapezoid blocks does it take to build a scaled copy of Figure C:
Using a scale factor of 2?
Using a scale factor of 3?
Using a scale factor of 4?
Student Response
Teachers with a valid work email address can
click here to register or sign in
for free access to Student Response.
Anticipated Misconceptions
Some students may come up with one of these arrangements for the first question, because they assume the answer will take 2 blocks to build:
[IMG]
You could use one pattern block to demonstrate measuring the lengths of the sides of their shape, to show them which side they have not doubled.
Students may also come up with:
[IMG]
for tripling the trapezoid, because they triple the height of the scaled copy but they do not triple the length. You could use the process described above to show that not all side lengths have tripled.
Activity Synthesis
Display a table with only the column headings filled in. For the first four rows, ask different students to share how many blocks it took them to build each shape and record their answers in the table.
|  scale factor   | number of blocks to build Figure A | number of blocks to build Figure B | number of blocks to build Figure C |
|-----------------|------------------------------------|------------------------------------|------------------------------------|
|        1        |                                    |                                    |                                    |
|        2        |                                    |                                    |                                    |
|        3        |                                    |                                    |                                    |
|        4        |                                    |                                    |                                    |
|        5        |                                    |                                    |                                    |
|       10        |                                    |                                    |                                    |
|      \(s\)      |                                    |                                    |                                    |
| \(\frac{1}{2}\) |                                    |                                    |                                    |
To help student notice, extend, and generalize the pattern in the table, guide a discussion using questions such as these:
In the table, how is the number of blocks related to the scale factor? Is there a pattern?
How many blocks are needed to build scaled copies using scale factors of 5 or 10? How do you know?
How many blocks are needed to build a scaled copy using any scale factor
\(s\)
?
If we want a scaled copy where each side is half as long, how much of a block would it take? How do you know? Does the same rule still apply?
If not brought up by students, highlight the fact that the number of blocks it took to build each scaled shape equals the scale factor times itself, regardless of the shape (look at the table row for
\(s\)
). This rule applies to any factor, including those that are less than 1.


correct_option_index: 1