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

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?

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

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?

• $9+9+162+162=342$
  

• $9\times162=1,458$
  

• $162\div9=18$
  

• $162+9=171$