We included **HMH Into Math Grade 3 Answer Key PDF** **Module 11 Lesson 1 Describe Perimeter **to make students experts in learning maths.

## HMH Into Math Grade 3 Module 11 Lesson 1 Answer Key Describe Perimeter

I Can count or use addition or multiplication to find the distance around a polygon.

**Spark Your Learning**

Sam draws a visual model of a goat pen on dot paper. He wants to know the total length of fence that will go all the way around the pen.

Show a way to find the distance around the goat pen.

Answer:

Finding distance is nothing but finding the perimeter

So perimeter of given rectangle

p = 2 (l + w)

p = 2(4 + 6)

p = 2 x 10

p = 20

The distance around the goat pen is 20 units.

**Turn and Talk** What strategy did you use to find the distance around the rectangle?

Answer:

I used the perimeter formula to find out the distance.

to find the distance of the rectangle.

**Build Understanding**

Question 1.

Ellie draws a visual model of a rabbit pen on grid paper. She wants to know the total length of fence that will go all the way around the pen.

A. What do you need to find to know the total length of fence Ellie needs?

Answer:

Finding distance is nothing but finding the perimeter

So perimeter of given rabbit pen

p = 2(l + w)

p = 2 x 10

p = 20

B. How can you find the length of each side?

Answer:

By counting the square units from one corner to the other corner.

Connect to Vocabulary

Perimeter is the distance around a figure. Perimeter is measured in linear units, or units that are used to measure the distance between two points.

C. What equation can you write using the side lengths of the pen to find the perimeter?

Answer:

p = 2(l + b)

is the formula to find the perimeter and the side.

D. What is the total length of fence Ellie needs?

Answer:

20 units is the total fence that Ellie needs.

**Turn and Talk** If the sides of the figure are all the same length, how could you use multiplication find the perimeter?

Answer:

If all sides are equal then we call it as square

the perimeter of a square is = 4a

As all sides have same length 4 is 4 sides and l = length of one side

Question 2.

Jake draws a visual model on dot paper for a new sheep pen. He wants to know how much fence he will need to go around the pen.

A. Do you need to find the perimeter or area of the sheep pen?

Answer:

p = sum of all sides

p = 1 + 2 + 2 + 1 + 3 + 3

p= 12

Connect to Vocabulary

You have learned that area is the measure of the number of unit squares needed to cover a surface.

B. What equation can you write to find how much fence Jake will need?

Answer:

p = sum of all sides

p = 1 + 2 + 2 + 1 + 3 + 3

p= 12

12 units of fence that Jake will need.

C. What are other situations where you need to find perimeter? Where you need to find area?

Answer:

area = number of square units covered

a = 5 is the total area.

**Check Understanding**

**Find the perimeter.**

Question 1.

Answer:

so perimeter is 20 units

Explanation:

p = 2(l + w)

p = 2(2 + 8)

p = 2 x 10

p = 20

Question 2.

Answer:

Explanation:

p = sum of sides

p = 2 + 2 + 1 + 3 + 3 + 5

p = 16

**On Your Own**

Question 3.

**Use Tools** Mia uses rubber bands to make this square on a geoboard. The distance between each peg is one unit. Describe two ways to find the perimeter of her square.

Answer:

First way is 2(l + w)

p = 2 (4 + 4)

p = 2 x 8

p = 16

second way is 4 x side

p = 4 x 4

p = 16

as the square on a geoboard is in square shape.

**Find the perimeter.**

Question 4.

Answer:

Perimeter of the given rectangle is 26 units.

Explanation:

p = 2(l + w)

p = 2 (5 + 8)

p = 2 x 13

p = 26

Question 5.

Answer:

Explanation:

p = sum of sides

p = 5 + 2 + 3 + 3 + 2 + 5

p = 20

**Does the situation describe area or perimeter?**

Question 6.

The number of units it takes to go around the rug on the floor of Nala’s room

Answer:

Yes., The continuous line forming the boundary of a closed geometrical figure.

Question 7.

The number of unit squares it takes to cover the floor of Nala’s room

Answer:

Area

In geometry, the area can be defined as the space occupied by a flat shape or the surface of an object.

**I’m in a Learning Mindset!**

What is my mindset when I’m finding the perimeter of a polygon?

Answer:

In finding the perimeter of polygon added the total sides

that is perimeter.