Analyze Different Rectangles and Reason about their Area

By David Kwan

5 Questions

1

10

Lamar uses square tiles to make the 2 rectangles shown below.
Label the side lengths of the 2 rectangles.

2

10

Write the equation to find the area of the rectangle A.

3

10

Write the equation to find the area of the rectangle B.

4

10

Lamar pushes Rectangle A next to Rectangle B to make a bigger rectangle. What is
the area of the bigger rectangle?

5

10

Explain your previous answer.

From EngageNY.org of the New York State Education Department. Grade 3 Mathematics Module 4, Topic C, Lesson 9. Internet. Available from http://www.engageny.org/resource/grade-3-mathemati...; accessed 27/Oct/2015.