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?