Perimeter and Area

Perimeter and Area

mafs.4.md.1.3

Objective

• Use the formula for perimeter to solve problems

• Use the formula for area to solve problems

Vocabulary

• Formula: A mathematical relationship that is expressed in the form of an equation

• Perimeter: the distance around a two-dimensional shape

• Area: the amount of space inside a closed two-dimensional figure

Video Time!

https://youtu.be/rSVMrPu0__U

Multiple Choice

The space inside an object is called it's

• area

• perimeter

Multiple Choice

The distance around an object is called the

• area

• perimeter

• length

Multiple Choice

To solve the problem, do you use perimeter or area?

• perimeter

• area

Multiple Choice

How do you find the perimeter?

• multiplying the length times the height

• adding all the sides

Fill in the Blanks

How much fencing is there in all?

Fill in the Blanks

What is the length of the garden?

Multiple Choice

What is the total length of the garden? (Add both side lengths)

• 40

• 64

• 80

• 20

Multiple Choice

How much fencing is left for the other two sides?

• 64-20=44

• 40-20=20

• 64-40=24

• there is no fence left

Open Ended

How can we find the length of the other two sides of the garden?

Fill in the Blanks

The perimeter of a rectangle is 14 feet and the length is 4 feet. What is the width?

Multiple Choice

Keegan is building a rectangular play area in his backyard for his dog. The length of the rectangle is 30 feet and the width is 24 feet. What amount if fence does he need?

• 54

• 108

• 720

• 72

Fill in the Blanks

Bianca is fencing in a garden. She wants the garden to be a rectangle 15 feet by 10 feet. How much fence does she need to buy to make her garden?

Multiple Choice

Carla wants to create a garden in her backyard. She wants the width of the garden to be 9 meters and the area to be 162 square meters. What length should she make the garden?

• $9+9+162+162=342$
  

• $9\times162=1,458$
  

• $162\div9=18$
  

• $162+9=171$

Fill in the Blanks

Bryan is building a deck. He wants the length of the deck to be 7 feet. If he wants the are of the deck to be 105 square feet, what will be the width of the deck? (only write the number)