Old MacDonald’s Farm Katy Moser

Content Area: Mathematics Grade Level: 4 th 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 inches w = 6 inches h = 3 inches 2 (6) + 2 (3) = ___ Simplify: = 18 Therefore, 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) 26B) 40C)

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

Question 2 What is the perimeter of the horse’s fence? 10 feet 5 feet A) 15 B) 50 C)

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

Question 3 What is the perimeter of the cow’s fence? 15 feet 3 feet A)1818 A)3636 A)4545

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.

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