Finding Area Using Multiplication: Understanding Length and Width

This lesson teaches how to find the area of a polygon by multiplying its length and width. It reviews key concepts such as area, perimeter, length, and width, and explains how to use arrays for multiplication. The lesson highlights common mistakes in area calculation and demonstrates the tiling method to find the area. It also shows how to use grid paper and arrays to calculate the area, concluding with a final example to reinforce the learning.

What does area tell us about a polygon?

Explain how to use an array to find the area of a rectangle.

What is a common mistake when calculating the area of a shape?

How do you find the area of a rectangle using length and width?

How can you verify the area of a shape after calculating it?