<img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />
Skip Navigation

10.1: FOILed Again

Difficulty Level: At Grade Created by: CK-12
Turn In

This activity is intended to supplement Algebra I, Chapter 9, Lesson 2.

Problem 1 - Introduction to Area of a Rectangle

Run the AREA program (in PRGM) and select the option for Problem 1 (#1).

Enter 6 for .

1. What are the lengths of the sides of the rectangle?

2. What is the area of the rectangle when ?

Now, change the width of the side by running the program again and enter a new value for .

3. What is the area of the rectangle when ? When ?

4. Explain how the expression for the area is simplified.

Problem 2 - Areas of Small Rectangles

The rectangle at the right has dimensions and rate of . Each piece of the rectangle is a different color so that you can focus on its area.

5. What is the area of each small rectangle?

6. What is the total area of the rectangle?

Problem 3 - FOIL Method

Run the AREA program and select the option for Problem 3.

Enter for .

7. How do the areas of the small rectangles in Problem 2 relate to the expression shown on the bottom of the screen?

Practice finding the area of a rectangle and then check your answers with the program.

8. What is the expression of the area of a rectangle with dimensions and ?

9. a.




Practice finding the area. Record your answers here. Show each step of your work. Use the program to check your answer.

1. a.




Next, you will be multiplying a trinomial (3 terms) times a binomial (2 terms) to find the area of a rectangle.

2. What method can you use to find the simplified expression for the area?

3. Use the letters and to determine the formula used to find the 6 terms of area shown at the right.

4. What is the area of the rectangle with dimensions and ?

5. a.



Notes/Highlights Having trouble? Report an issue.

Color Highlighted Text Notes
Please to create your own Highlights / Notes
Show More

Image Attributions

Show Hide Details
Date Created:
Feb 22, 2012
Last Modified:
Oct 31, 2014
Files can only be attached to the latest version of section
Please wait...
Please wait...
Image Detail
Sizes: Medium | Original