Finding the Area of a Polygon Using Smaller Rectangles

This lesson teaches how to find the area of a polygon by dividing it into smaller rectangles. It begins with a review of basic area concepts, emphasizing the importance of multiplying length by width for rectangles. The lesson then addresses common mistakes, such as incorrectly multiplying side lengths of irregular shapes. It demonstrates how to break down complex polygons into smaller, manageable rectangles, calculate their individual areas, and sum them to find the total area. The lesson concludes with a summary of these techniques.

How do you calculate the area of a rectangle or square?

What mistake might you make when calculating the area of a polygon?

How can you break a polygon into smaller shapes to find its area?

What are the dimensions of the black rectangle in the example?

What is the total area of the two smaller rectangles combined?

What is the method to find the area of a polygon without counting each square tile?

What is the area of the green rectangle as described in the lesson?