Unit 7, Lesson 8-- Exploring Area of Rectangles

Lesson 8-- Exploring Area of Rectangles

Introduction

Hello Mathematicians! Today we will continue to explore the area of rectangles.

Take a look at these two rectangles.  They each are covered with partially completed arrays.  How can we find the area of these rectangles?

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Video

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Interactive

Part 1 Directions:

• Below is a sketch of Martin’s Garden. The shaded areas are the flower beds.
• Which flower bed has the largest area? How do you know?
• Show your thinking in your math notebook using drawings, numbers, and words.

Part 2 Directions:

• Switch the geoboard to the rectangle building board.  Build your own gardens composed of rectangles. 
• Determine the area of each by counting the number of squares that would fit inside.
• What do you notice about area as you build your rectangles?  Jot down your thoughts in your math notebook.

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In Your Math Notebook:

Let’s get out our math journals and  work through the following application problem. Make sure you read the problem carefully, draw a picture to match your thinking and write and solve an equation.

Read, Draw, Write. DONE!

R (Read the problem carefully.) Mrs. Murphy dug a rectangular flower bed that was 5 yards longs and 4 yards wide.  What was the area of the flower bed? D (Draw a picture.) W (Write and solve an equation.)

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Georgia Department of Education, Math