# Into Math Grade 3 Module 11 Lesson 2 Answer Key Find Perimeter

We included HMH Into Math Grade 3 Answer Key PDF Module 11 Lesson 2 Find Perimeter to make students experts in learning maths.

## HMH Into Math Grade 3 Module 11 Lesson 2 Answer Key Find Perimeter

I Can measure the lengths of the sides of polygons using inch or centimeter units to find the perimeter of a polygon. I can add side lengths to find the perimeter.

Use some tiles to make a figure. Draw a line around the figure. How can you find the distance around the figure? Show a way to find the length of each side. Explanation:
perimeter of a irregular polygon = sum of all sides
p = 3 + 4 + 1 + 1 + 2
p = 11 units.

Turn and Talk What strategy did you use to find the perimeter of the figure?
I used the irregular polygon perimeter formula
p = sum of all sides.

Build Understanding

Question 1.
Eric is making labels for his science poster. He wants to glue a piece of yarn around the sides of each label.  A. How can you find the length of yarn, in inches, that Eric needs for each label? perimeter of above picture = 4 x s
as it is in square
p = 4 x 4
p = 16 inches perimeter of above picture = 2 (l + b)
as it is in shape of rectangle
p = 2 (8 + 3)
p = 2 x 11
p = 22 inches.

B. What equation can you write to find the length of yarn that Eric needs? How long is the piece of yarn?
perimeter of above picture = 2 (l + b)
as it is in shape of rectangle
p = 2 (8 + 3)
p = 2 x 11
p = 22 inches. is the piece of yarn that Eric need.

Question 2.
Rhonda has an alligator sticker. A. How can Rhonda find the perimeter of her sticker in centimeters? Explanation:
perimeter of a rectangle = 2 (l + b)
p = 2 (3 + 9)
p = 2 x 12
p = 24 cm.

B. What equation can you write to find the perimeter?
perimeter of a rectangle = 2 (l + b)

the continuous line forming the boundary of a closed geometrical figure.
“the perimeter of a rectangle”

Step It Out

Question 3.
Mrs. Lopez is making quilt pieces. She wants to sew ribbon around the sides of each quilt piece. A. Use a centimeter ruler to measure the length of each side. perimeter of a rectangle = 2 (l + b)
p = 2 (5 + 6)
p = 2 x 11
p = 22 centimeters

B. Add the lengths of the sides.  C. What is the length of ribbon she needs for each quilt piece?
perimeter = sum of all sides
p = 3 + 6 + 6 + 3 + 3 + 3
p = 12 + 12
p = 24 centimeters.

Turn and Talk How does knowing the length of each side help you know the perimeter?
BY the help of ruler we got to know the length of each side.

Check Understanding

Use a ruler to measure each side to the nearest inch or centimeter. Find the perimeter.

Question 1.  Explanation:

the continuous line forming the boundary of a closed geometrical figure.
“the perimeter of a rectangle”
I used the irregular polygon perimeter formula
p = sum of all sides.
p = 3 + 3 + 6 + 3
p = 15 inches

Question 2.  Explanation:

the continuous line forming the boundary of a closed geometrical figure.
“the perimeter of a rectangle”
I used the irregular polygon perimeter formula
p = sum of all sides.
p = 7 + 6 + 2 + 1
p = 16 cm

Question 3.
Reason Manny is cutting rectangular slate tiles for a walkway. A tile has side lengths of 8 inches and 6 inches. Describe how to find the perimeter of a tile.
Explanation:
As the length and width are given
formula for a rectangle p = 2(l + b)
p = 2 (8 + 6)
p = 2 x 14
p = 28 inches.

Use a centimeter ruler to measure each side to the nearest centimeter. Find the perimeter.

Question 4.  Explanation:
the continuous line forming the boundary of a closed geometrical figure.
“the perimeter of a rectangle”
perimeter of a rectangle = 2 (l + b)
p = 2 x (3 + 4)
p = 2 x 7
p = 14 cm

Question 5.  Explanation:

the continuous line forming the boundary of a closed geometrical figure.
“the perimeter of a rectangle”
I used the irregular polygon perimeter formula
p = sum of all sides.
p = 4 + 3 + 2 + 1 + 1
p = 11 cm

Question 6.
Open-Ended Write a word problem about finding the perimeter of this painting. Solve your word problem. Miss. Rosy saw a poster on a show. she is measuring the length of the poster. To check whether it fits to her wall or not? Find the perimeter of the poster?
Explanation:
perimeter of rectangle p = 2 (l + b)
p = 2(18 + 20)
p = 2 x 38
p = 76

I’m in a Learning Mindset!

How am I responding to the change from counting units to using a ruler to find perimeter?