 # Construct rectangles from unit squares and determine the perimeters

Videos, examples, and solutions to help Grade 3 students learn how to construct rectangles from a given number of unit squares and determine the perimeters.

Common Core Standards: 3.MD.4, 3.MD.8, 3.G.1

Related Topics:
Lesson Plans and Worksheets for Grade 3,
Lesson Plans and Worksheets for all Grades,

New York State Common Core Math Grade 3, Module 7, Lesson 18

Lesson 18 Homework

1. Shade in squares on the grid below to create as many rectangles as you can with an area of 18 square centimeters.

2. Find the perimeter of each rectangle in Problem 1 above.

3. Estimate to draw as many rectangles as you can with an area of 20 square centimeters. Label the side lengths of each rectangle.
a. Which rectangle above has the greatest perimeter? How do you know?
b. Which rectangle above has the smallest perimeter? How do you know?

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.  