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.

**Spark Your Learning**

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.

Answer:

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?

Answer:

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?

Answer:

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?

Answer:

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?

Answer:

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?

Answer:

perimeter of a rectangle = 2 (l + b)

**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.

Answer:

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.

Answer:

C. What is the length of ribbon she needs for each quilt piece?

Answer:

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?

Answer:

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.

Answer:

Explanation:

I used the irregular polygon perimeter formula

p = sum of all sides.

p = 3 + 3 + 6 + 3

p = 15 inches

Question 2.

Answer:

Explanation:

I used the irregular polygon perimeter formula

p = sum of all sides.

p = 7 + 6 + 2 + 1

p = 16 cm

**On Your Own**

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.

Answer:

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.

Answer:

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.

Answer:

Explanation:

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.

Answer:

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?

Answer:

We can visualize the ruler directly

so, we can count the units fast.