We included **HMH Into Math Grade 2 Answer Key PDF** **Module 21 Lesson 1 Identify and Draw Three-Dimensional Shapes **to make students experts in learning maths.

## HMH Into Math Grade 2 Module 21 Lesson 1 Answer Key Identify and Draw Three-Dimensional Shapes

I Can describe and compare the attributes of three-dimensional shapes.

**Spark Your Learning**

How can you show the shapes Sara could put in her collection?

Read the following. Sara wants to make a collection of items shaped like cubes and rectangular prisms for a school project. Look around the room. What items could Sara include in her collection?

Answer:

Cube:

Rectangular Prism:

**Build Understanding**

Question 1.

Anah is writing clues for a three-dimensional shape guessing game. What clue could he write for a cube?

Circle

square

triangle

A. How can you describe a cube by its faces?

A cube has _________ faces.

Every face is shaped like a _________.

Answer:

A cube has six faces.

Every face is shaped like a square.

Explanation:

A cube is a three-dimensional solid object bounded by six square faces, facets, or sides, with three meeting at each vertex. The lengths of the cube are the same.

**Connect to Vocabulary**

Each flat surface of a three-dimensional shape is a face.

An edge is where two faces of a three- dimensional shape meet.

The vertices are the corner points of a three-dimensional shape. Each corner point is called a vertex.

B. What are some other ways to describe a cube?

A cube has _________ edges and __________ vertices.

Answer: A cube has 12 edges and 8 vertices.

C. Write Anah’s clue.

Answer: Anah’s clue is square.

D. Anah traces the faces of a cube. Circle the group of shapes that show what Anah traces.

Answer:

A cube is a three-dimensional figure with six square faces.

**Turn and Talk** Which objects in your classroom are shaped like cubes?

Answer: chalk piece box

Question 2.

Milena is also writing clues for a three-dimensional shape guessing game. What clue could she write for a rectangular prism?

circle

rectangle

square

A. How can you describe a rectangular prism by its faces?

A rectangular prism has ________ faces.

Its faces are shaped like ___________.

Answer:

A rectangular prism has six faces.

Its faces are shaped like rectangles.

Explanation:

In geometry, a rectangular prism can be defined as a 3-dimensional solid shape that has six faces that are rectangles.

B. What are some other ways to describe a rectangular prism?

A rectangular prism has ________ edges and _________ vertices.

Answer: A rectangular prism has 12 edges and 8 vertices.

C. Write Milena’s clue.

Answer: The clue of Milena is a rectangle.

D. Which objects in your classroom are shaped like rectangular prisms?

Answer: Books and Board are objects that look like rectangular prism.

**Turn and Talk** How are cubes and rectangular prisms alike? How are they different?

Answer: A cube is a rectangular prism with all sides equal, and therefore all faces of equal area. A rectangular prism will have four faces of equal area and two faces of equal area. So a cube is a rectangular prism, but not all rectangular prisms are cubes.

**Build Understanding**

**Use the directions to draw a cube.**

A. Draw a square. Make each side 4 units long.

Answer:

B. Draw edges from 3 vertices, like this.

Answer:

C. Draw 2 more edges.

Answer:

D. Draw 3 dashed edges to show the faces that are not seen.

Answer:

**Check Understanding**

cube

rectangular prism

Question 1.

Mackenzie has a three-dimensional shape with 6 faces, 12 edges, and 8 vertices. The faces are all shaped like squares. What shape does she have?

Answer:

Given data,

Mackenzie has a three-dimensional shape with 6 faces, 12 edges, and 8 vertices.

The faces are all shaped like squares.

A cube is a shape that has 6 faces, 12 edges, and 8 vertices.

Thus the name of the shape is a cube.

Question 2.

Sammy has a three-dimensional shape with 6 faces, 12 edges, and 8 vertices. The faces are shaped like rectangles. What shape does he have?

Answer:

Given,

Sammy has a three-dimensional shape with 6 faces, 12 edges, and 8 vertices.

The faces are shaped like rectangles.

The name of the shape is a rectangular prism.

**On Your Own**

Question 3.

**Construct Arguments** Sahil is not sure if he is holding a rectangular prism or a cube. How can he decide which shape he has? Explain.

Answer:

If he is holding a square type shape then the name of the shape is a cube.

If he is holding a rectangle type shape then the name of the shape is a rectangular prism.

Question 4.

**Use Repeated Reasoning** How many faces, edges, and vertices does a rectangular prism have?

________ faces

________ edges

________ vertices

Answer:

A rectangular prism has

6 faces

12 edges

8 vertices

Question 5.

Use the word bank to label the parts of the rectangular prism.

edge

face

vertex

Answer:

The parts of the rectangular prism are

1. Face

2. Edge

3. Vertex

Question 6.

**Attend to Precision** Trace all the faces of a cube on a sheet of paper. Describe the shapes.

Answer:

Question 7.

Marissa wants to put a picture on each face of a memory cube. How many pictures will she need?

__________ pictures

Answer:

Given,

Marissa wants to put a picture on each face of a memory cube.

A cube has 6 faces.

Thus she need 6 pictures.

circle

square

triangle

Question 8.

What shape will she put the pictures on?

Answer: square

Question 9.

How many faces does this shape have?

________ faces

Answer:

The name of the shape is a rectangular prism.

A rectangular prism has 6 faces.

Question 10.

**Attend to Precision** How many edges and vertices does this shape have?

________ edges

________ vertices

Answer:

12 edges

8 vertices

A cube is a shape that has 6 faces, 12 edges, and 8 vertices.

**I’m in a Learning Mindset!**

What do I already know that can help me to identify and draw three-dimensional shapes?

Answer:

By using the clues you can know the name of the three-dimensional shape.

For example, if the clue is square then the name of the 3D figure is the cube.

For example, if the clue is a rectangle then the name of the 3D figure is a rectangular prism.