How to Solve Rectangle Area Problems Series

The How to Solve Rectangle Area Problems Series is a series of posts on the basics of solving rectangle area problems. This post is a summary of the rectangle area series.

1.) Calculating Areas of Geometric Figures discusses the notion of area and the intuitive derivation of the formula A = l \times w where A is the area of a rectangle, l is its length and w its width.

2.) How to Solve Rectangle Area Problems Part 1 discusses the basic problems involving area of rectangles.

3.) How to Solve Rectangle Area Problems Part 2 discusses intermediate problems involving area of rectangles. This involves solving the area given the rectangle’s perimeter.

4.) Rectangle Area Problems Quiz is a self quiz to be able to determine your understanding regarding rectangle area.

I hope you enjoyed this series. More series to come in the future.

 

How to Solve Rectangle Area Problems Part 1

The area of a rectangle including square are the simplest to calculate.  As we have discussed in the previous post, they can be calculated by multiplying their length and the width. That is if a rectangle has area A, length l and width w, then,

A = l \times w or simply A = lw.

In this post, we are going to solve various problem involving area of rectangles.

Problem 1

The length of a rectangle is 12 centimeters and its width is 5 centimeters. What is its area?

Solution

Using the representation above, l = 12 and w = 5. Calculating the area, we have

A = 12(5) = 60.

The area is 60 square centimeters.  » Read more

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