Slide 1

Old MacDonald’s
Farm

Katy Moser


Slide 2

• Content Area: Mathematics
• Grade Level: 4th grade
• Summary: The purpose of this instructional PowerPoint
is to review perimeter by building fences for Old
MacDonald’s farm animals.
• Learning Objective: Given the instructional PowerPoint
the student will complete the slideshow and answer the
perimeter questions with 100% accuracy.
• Content Standard: CCSS.Math.Content.4.MD.A.3 Apply
the area and perimeter formulas for rectangles in real
world and mathematical problems.


Slide 3

Perimeter of a Rectangle Review

Perimeter is the distance AROUND a twodimensional shape.


Slide 4

Review

w = width
h = height

h

w

Perimeter Formula for Rectangle:
Perimeter = 2 w + 2 h

~OR ~ w + w + h + h


Slide 5

Try It Together!
• Find the perimeter of this rectangle.

3 inches

w = 6 inches
h = 3 inches

6 inches

2 (6) + 2 (3) = ___
Simplify:
12 + 6 = 18
Therefore, the perimeter of this rectangle is 18 inches


Slide 6

Old MacDonald needs help
measuring fences for the animals
on his farm! Can you help him?


Slide 7

Question 1
• What is the perimeter of the pig’s
fence?
5 feet

8 feet

A) 26

B) 40

C) 13


Slide 8

Great Job
2 ( 8 ) + 2 ( 5 ) = 26


Slide 9

Question 2
• What is the perimeter of the horse’s fence?

10 feet

A) 15

B) 50

C) 30

5 feet


Slide 10

Great Job!
2 ( 10 ) + 2 ( 5 ) = 30


Slide 11

Question 3
• What is the perimeter of the cow’s fence?
3 feet

15 feet

A) 18

A) 36
A) 45


Slide 12

Great Job
2 ( 15 ) + 2 ( 3 ) = 36


Slide 13

Summary
• Today we learned about finding the
perimeter of rectangles.
• We started with simple one-digit
numbers then advanced onto two-digit
numbers.


Slide 14

Try Again