ol d macdonald’s farm
Post on 16-Mar-2016
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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
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