Old MacDonald’s

Farm

Katy Moser

• 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.

Perimeter of a Rectangle Review

Perimeter is the distance AROUND a two-dimensional shape.

Review

w

h

Perimeter Formula for Rectangle:

Perimeter = 2 w + 2 h ~OR ~ w + w + h + h

w = width h = height

Try It Together!

• Find the perimeter of this rectangle.

6 inches

3 inchesw = 6 inchesh = 3 inches

2 (6) + 2 (3) = ___Simplify:

12 + 6 = 18Therefore, the perimeter of this rectangle is 18 inches

Old MacDonald needs help measuring fences for the

animals on his farm! Can you help him?

Question 1

• What is the perimeter of the pig’s fence?

8 feet

5 feet

A) 26 B) 40 C) 13

Great Job

2 ( 8 ) + 2 ( 5 ) = 26

Question 2

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

10 feet

5 feetA) 15 B) 50 C) 30

Great Job!

2 ( 10 ) + 2 ( 5 ) = 30

Question 3

• What is the perimeter of the cow’s fence?

15 feet

3 feet A) 18

B) 36

C) 45

CORRECT!!Great Job

2 ( 15 ) + 2 ( 3 ) = 36

Summary• Today we learned about finding the

perimeter of rectangles. • We started with simple one-digit

numbers then advanced onto two-digit numbers.

INCORRECTTry Again