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

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

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

**Spark Your Learning**

How can you show the two-dimensional shapes Luis draws?

Read the following: Luis is drawing his favorite shapes. He wants to include a shape with 3 sides and a shape with H sides. What shapes can Luis draw? Have partners discuss how their answers are alike and different.

**Build Understanding**

Question 1.

Jon is making a book of shapes. She draws triangles and quadrilaterals. How can she describe the shapes?

Connect to Vocabulary

A two-dimensional shape with 4 sides is a quadrilateral. One of the lines that forms a two-dimensional shape is a side.

A vertex is the point where two sides meet.

A. How can she describe these two-dimensional shapes by the number of sides?

triangle: ________ sides

quadrilateral: ________ sides

Answer:

triangle: 3 sides

quadrilateral: 4 sides

Explanation:

Triangle: A triangle is a regular polygon with three sides.

Quadrilateral: A quadrilateral is a regular polygon with four sides.

B. How can she describe these two-dimensional shapes by the number of vertices?

triangle: ________ sides

quadrilateral: ________ sides

Answer:

triangle: three sides

quadrilateral: four sides

A triangle has three vertices.

A quadrilateral has four vertices.

C. Darnell makes a sign in the shape of a quadrilateral. What do you know about the sign?

Answer: The sign in the shape of a quadrilateral is the angle.

**Turn and Talk** Compare the number of sides and vertices in each shape. What do you see?

Answer:

The number of sides and vertices in a triangle is the same.

The number of sides and vertices in a quadrilateral is the same.

Question 2.

Jana adds a pentagon and a hexagon to her book of shapes. How can she describe the shapes?

Connect to Vocabulary

A two-dimensional shape with 5 sides is a pentagon.

A two-dimensional shape with 6 sides is a hexagon.

A. How can she describe these two-dimensional shapes by the number of sides?

pentagon: ________ sides

hexagon: ________ sides

Answer:

pentagon: 5 sides

hexagon: 6 sides

B. How can she describe these two-dimensional shapes by the number of vertices?

pentagon: _________ vertices

hexagon: __________ vertices

Answer:

pentagon: 5 vertices

hexagon: 6 vertices

C. What shape is a baseball home plate?

hexagon

pentagon

Answer:

The above shape has 5 sides and 5 vertices so the name of the shape is a pentagon.

Thus the baseball home plate is a pentagon.

D. The white parts of a soccer ball are shaped like a hexagon. How many sides does that part have?

_________ sides

Answer:

Given,

The white parts of a soccer ball are shaped like a hexagon.

A hexagon is a two-dimensional polygon with 6 sides.

**Turn and Talk** Compare the number of sides and vertices in each shape. What do you see?

Answer:

A hexagon is a regular polygon that has 6 sides and 6 vertices.

Question 3.

Jada draws a shape that has 5 sides and 5 vertices Q Draw a shape like Jada’s shape.

A. Draw a shape like Jada’s shape.

Answer:

B. What is the name of this shape?

Answer:

The shape that has 5 sides and 5 vertices is called a pentagon.

hexagon

pentagon

quadrilateral

Question 4.

Jada draws another shape. It has 6 sides and 6 vertices.

A. Draw a shape like Jada’s shape.

Answer:

B. What is the name of this shape?

Answer:

The shape that has 6 sides and 6 vertices is called a hexagon.

**Check Understanding**

Question 1.

Neve has a quadrilateral. How many vertices does her shape have?

_________ vertices

Answer:

Given,

Neve has a quadrilateral.

A quadrilateral is a polygon with four sides and four vertices.

Thus her shape has 4 vertices.

Question 2.

Draw a shape with 3 sides and 3 vertices.

Answer:

The shape with 3 sides and 3 vertices is called a triangle.

**On Your Own**

Question 3.

Kyle sees a sign that has 3 sides. What shape is the sign? What else do you know about the sign? Solve and explain.

Answer:

The shape of the above sign is a triangle.

Question 4.

**Reason** Which shape has more vertices, a hexagon or a pentagon? Explain.

Answer:

The shape that has 6 sides and 6 vertices is called a hexagon.

The shape that has 5 sides and 5 vertices is called a pentagon.

A hexagon has more vertices than a pentagon.

Question 5.

**Use Repeated Reasoning** Roma’s shape has 4 sides. It is not a square or a rectangle. Draw the shape.

Answer:

Roma’s shape has 4 sides.

A shape neither square nor rectangle is a quadrilateral.

Question 6.

Jan’s shape has 6 sides and 6 vertices. Draw and name his shape.

Answer:

Given,

Jan’s shape has 6 sides and 6 vertices.

The shape that has 6 sides and 6 vertices is called a hexagon.

**On Your Own**

**Use Structure** Pedro draws this picture of a house.

Question 7.

How many sides and vertices does it have?

________ sides

_________ vertices

Answer:

5 sides

5 vertices

The shape that has 5 sides and 5 vertices is called a pentagon.

Question 8.

Name the shape

Answer: The name of the shape is a pentagon.

Question 9.

**Attend to Precision** Pedro’s friend draws a shape with 4 sides and 4 vertices.

Name the shape.

Answer:

The shape with 4 sides and 4 vertices is a quadrilateral.

Question 10.

**Reason** Mark says that if you know the number of vertices in a shape, you can find the number of sides. Is Mark correct? Explain how you know.

Answer: Yes, if you know the number of vertices in a shape, you can find the number of sides.

Example: If the number of vertices of a shape is 6 then the name of the shape is hexagon with 6 sides.

**I’m in a Learning Mindset!**

Who should I talk with to learn more about identifying and drawing two-dimensional shapes?

Answer:

How do you identify 2D shapes?