I. Introduction

Dear students, hello! Today, we will discuss the area calculation methods of two very important geometric shapes-rectangle and square. Through learning, we can not only understand how the areas of these two shapes are calculated, but also apply this knowledge to real life.

Second, the area of the rectangle.

The area of a rectangle is a very basic geometric concept.

We can calculate the area of a rectangle by the following steps:

Determines the length and width of the rectangle. Use the formula: area = length × width.

For example, if a rectangle is 5cm long and 3cm wide, its area is 5cm× 3cm =15cm square.

Third, the area of the square.

A square is a special rectangle whose four sides are equal in length. Therefore, we only need to know the length of one side to calculate the area of a square.

Determine the side length of a square. Use the formula: area = side length × side length.

For example, if the side length of a square is 4cm, then its area is 4cm× 4cm = 16cm2.

Fourthly, compare the area of rectangle and square.

We have learned how to calculate the areas of rectangles and squares. So, what is the relationship between their regions?

In fact, if the length and width of a rectangle are equal, its area is the area of a square. In other words, a square can be regarded as a rectangle, in which the length and width are equal.

Application example of verb (abbreviation of verb)

Now that we know how to calculate the area of rectangle and square, let's look at some practical examples!

For example, we have a rectangle with an area of 15 cm2 and a square with an area of 16 cm2. We can compare their areas and find that the square has a larger area. This shows that the square is a more efficient shape, because it can provide more use space without increasing materials.

Conclusion of intransitive verbs

Through this study, we know how to calculate the area of rectangle and square, and know that square is a more efficient shape. I hope this knowledge can help us to better apply geometry knowledge in our future study and life.