Videos, examples, and solutions to help Grade 3 students learn how to solve a variety of word problems with perimeter and how to use rectangles to draw a robot with specified perimeter measurements, and reason about the different areas that may be produced.
Common Core Standards: 3.MD.8, 3.G.1
Plans and Worksheets for Grade 3
Plans and Worksheets for all Grades
Lessons for Grade 3
Common Core For Grade 3
New York State Common Core Math Grade 3, Module 7, Lesson 24, Lesson 25
Download the Worksheets for Grade 3, Module 7, lesson 24 (pdf)
Download the Worksheets for Grade 3, Module 7, lesson 25 (pdf)
Download the Worksheets for Grade 3, Module 7, lesson 26 (pdf)
Lesson 24 Homework
1. Brian draws a square with a perimeter of 24 inches. What is the width and length of the square?
2. A rectangle has a perimeter of 18 centimeters.
a. Estimate to draw as many different rectangles as you can that have a perimeter of 18 centimeters.
Label the width and length of each rectangle.
b. How many different rectangles did you find?
c. Explain the strategy you used to find the rectangles.
3. The chart below shows the perimeters of three rectangles.
a. Write possible widths and lengths for each given perimeter.
Lesson 25 Homework
1. The robot below is made of rectangles. The side lengths of each rectangle are labeled. Find the
perimeter of each rectangle and record it in the table on the next page.
Lesson 26 Homework
1. Use Rectangles A and B to answer the questions below.
a. What is the perimeter of Rectangle A?
b. What is the perimeter of Rectangle B?
c. What is the area of Rectangle A?
d. What is the area of Rectangle B?
e. Use your answers to Parts (a) through (d) to help you explain the relationship between area and
2. Each student in Mrs. Dutra’s class draws a rectangle with whole number side lengths and a perimeter of
28 centimeters. Then they find the area of each rectangle and create the table below.
a. Give two examples to show how it is possible to have different areas for rectangles that have the
b. Did any students in Mrs. Dutra’s class draw a square? Explain how you know.
c. What are the side lengths of the rectangle that most students in Mrs. Dutra’s class made with a
perimeter of 28 centimeters?
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