The Dimension of a Rectangle

Oct 13, 2025 by miodeya.com 28 views

Introduction

In geometry, the area of a rectangle is calculated by multiplying its length and width. However, when a path of uniform width runs around the outside of the rectangle, the area of the path becomes a complex problem that requires a deeper understanding of geometry and algebra. In this article, we will explore the dimension of a rectangle and the area of a path that runs around it.

The Dimension of a Rectangle

The dimension of a rectangle is given by the formula (8x+6y) meters and (4x+2y) meters. This means that the length of the rectangle is (8x+6y) meters and the width is (4x+2y) meters. To find the area of the rectangle, we multiply its length and width.

The Area of the Rectangle

The area of the rectangle is calculated by multiplying its length and width.

Area = Length x Width
= (8x+6y) x (4x+2y)
= 32x^2 + 16xy + 24xy + 12y^2
= 32x^2 + 40xy + 12y^2

The Path of Uniform Width

A path of uniform width (x+y) meters runs around the outside of the rectangle. To find the area of the path, we need to find the area of the larger rectangle that includes the path and subtract the area of the original rectangle.

The Area of the Larger Rectangle

The larger rectangle has a length of (8x+6y) + 2(x+y) meters and a width of (4x+2y) + 2(x+y) meters.

Length = (8x+6y) + 2(x+y)
= 8x + 6y + 2x + 2y
= 10x + 8y
Width = (4x+2y) + 2(x+y)
= 4x + 2y + 2x + 2y
= 6x + 4y

The Area of the Larger Rectangle

The area of the larger rectangle is calculated by multiplying its length and width.

Area = Length x Width
= (10x + 8y) x (6x + 4y)
= 60x^2 + 40xy + 48xy + 32y^2
= 60x^2 + 88xy + 32y^2

The Area of the Path

The area of the path is the difference between the area of the larger rectangle and the area of the original rectangle.

Area of Path = Area of Larger Rectangle - Area of Original Rectangle
= (60x^2 + 88xy + 32y^2) - (32x^2 + 40xy + 12y^2)
= 28x^2 + 48xy + 20y^2

Conclusion

In conclusion, the area of the path that runs around the outside of a rectangle with dimensions (8x+6y) meters and (4x+2y) meters is given by the formula 28x^2 + 48xy + 20y^2. This formula can be used to find the area of the path for any values of x and y.

Final Answer

The final answer is 28x^2 + 48xy + 20y^2.

Introduction

In our previous article, we explored the dimension of a rectangle and the area of a path that runs around it. In this article, we will answer some of the most frequently asked questions about the topic.

Q: What is the formula for the area of the path?

A: The formula for the area of the path is 28x^2 + 48xy + 20y^2.

Q: How do I find the area of the path if the dimensions of the rectangle are not given in terms of x and y?

A: If the dimensions of the rectangle are not given in terms of x and y, you can substitute the values of x and y into the formula for the area of the path. For example, if the length of the rectangle is 10 meters and the width is 5 meters, you can substitute x = 1 and y = 1 into the formula to get the area of the path.

Q: What if the path is not uniform in width?

A: If the path is not uniform in width, the formula for the area of the path will be more complex. In this case, you will need to use calculus to find the area of the path.

Q: Can I use the formula for the area of the path to find the area of a circle?

A: No, the formula for the area of the path is specific to rectangles and cannot be used to find the area of a circle.

Q: What if the rectangle is not a perfect rectangle, but rather a trapezoid or a parallelogram?

A: If the rectangle is not a perfect rectangle, but rather a trapezoid or a parallelogram, the formula for the area of the path will be more complex. In this case, you will need to use calculus to find the area of the path.

Q: Can I use the formula for the area of the path to find the area of a 3D shape?

A: No, the formula for the area of the path is specific to 2D shapes and cannot be used to find the area of a 3D shape.

Q: What if I want to find the area of the path in terms of a specific unit, such as square meters or square feet?

A: To find the area of the path in terms of a specific unit, you will need to multiply the formula for the area of the path by the conversion factor for that unit. For example, if you want to find the area of the path in square feet, you will need to multiply the formula by 10.76 (since 1 square meter is equal to 10.76 square feet).

Conclusion

In conclusion, the formula for the area of the path is a powerful tool that can be used to find the area of a path that runs around a rectangle. However, it is essential to understand the limitations of the formula and to use it only for 2D shapes.