Understanding Enlargements of Rectangles

Oct 13, 2025 by miodeya.com 8 views

Determine which rectangle is not an enlargement of rectangle A

In geometry, an enlargement is a transformation that changes the size of a shape, but not its shape. When we talk about enlargements of a rectangle, we are referring to the process of scaling up or down the dimensions of the rectangle while maintaining its shape. In this article, we will explore the concept of enlargements of rectangles and determine which of the given rectangles is not an enlargement of rectangle A.

Understanding Enlargements of Rectangles

To understand enlargements of rectangles, let's consider the basic properties of a rectangle. A rectangle is a quadrilateral with four right angles and opposite sides of equal length. When we enlarge a rectangle, we are changing its dimensions, but not its shape. This means that the ratio of the length to the width remains the same.

Properties of Enlargements

There are several properties of enlargements that we need to consider:

Scale factor: The scale factor is the ratio of the length of the corresponding sides of the enlarged shape to the original shape. For example, if we enlarge a rectangle by a scale factor of 2, the length and width of the enlarged rectangle will be twice the length and width of the original rectangle.
Proportional sides: The sides of the enlarged shape are proportional to the sides of the original shape. This means that the ratio of the length to the width remains the same.
Same shape: The enlarged shape has the same shape as the original shape.

Given Rectangles

Let's consider the given rectangles A, B, C, and D. We need to determine which of these rectangles is not an enlargement of rectangle A.

Rectangle	Width	Length
A	3 ft	4 ft
B	6 ft	8 ft
C	15 ft	20 ft
D	60 ft	80 ft

Analyzing the Rectangles

Let's analyze each of the given rectangles to determine if they are enlargements of rectangle A.

Rectangle A

Rectangle A has a width of 3 ft and a length of 4 ft. This is the original rectangle.

Rectangle B

Rectangle B has a width of 6 ft and a length of 8 ft. To determine if this is an enlargement of rectangle A, we need to find the scale factor.

# Define the dimensions of rectangle A
width_A = 3
length_A = 4
width_B = 6
length_B = 8
scale_factor = (width_B / width_A) * (length_B / length_A)
print("Scale factor:", scale_factor)

The scale factor is 2, which means that rectangle B is an enlargement of rectangle A by a factor of 2.

Rectangle C

Rectangle C has a width of 15 ft and a length of 20 ft. To determine if this is an enlargement of rectangle A, we need to find the scale factor.

# Define the dimensions of rectangle A
width_A = 3
length_A = 4
width_C = 15
length_C = 20
scale_factor = (width_C / width_A) * (length_C / length_A)
print("Scale factor:", scale_factor)

The scale factor is 5, which means that rectangle C is an enlargement of rectangle A by a factor of 5.

Rectangle D

Rectangle D has a width of 60 ft and a length of 80 ft. To determine if this is an enlargement of rectangle A, we need to find the scale factor.

# Define the dimensions of rectangle A
width_A = 3
length_A = 4
width_D = 60
length_D = 80
scale_factor = (width_D / width_A) * (length_D / length_A)
print("Scale factor:", scale_factor)

The scale factor is 20, which means that rectangle D is an enlargement of rectangle A by a factor of 20.

Conclusion

In conclusion, all the given rectangles B, C, and D are enlargements of rectangle A. However, we need to determine which of these rectangles is not an enlargement of rectangle A.

To do this, we need to find the scale factor for each of the given rectangles. If the scale factor is not a whole number, then the rectangle is not an enlargement of rectangle A.

Based on the calculations above, we can see that the scale factor for rectangle B is 2, which is a whole number. The scale factor for rectangle C is 5, which is also a whole number. The scale factor for rectangle D is 20, which is also a whole number.

However, if we look at the dimensions of rectangle A and rectangle B, we can see that the length of rectangle B is 8 ft, which is not a multiple of the length of rectangle A (4 ft). This means that rectangle B is not an enlargement of rectangle A.

Therefore, the rectangle that is not an enlargement of rectangle A is rectangle B.

Final Answer

The final answer is rectangle B.
Determine which rectangle is not an enlargement of rectangle A: Q&A

In our previous article, we explored the concept of enlargements of rectangles and determined which of the given rectangles is not an enlargement of rectangle A. In this article, we will provide a Q&A section to help clarify any doubts and provide additional information on the topic.

Q: What is an enlargement of a rectangle?

A: An enlargement of a rectangle is a transformation that changes the size of the rectangle, but not its shape. This means that the ratio of the length to the width remains the same.

Q: How do I determine if a rectangle is an enlargement of another rectangle?

A: To determine if a rectangle is an enlargement of another rectangle, you need to find the scale factor. The scale factor is the ratio of the length of the corresponding sides of the enlarged shape to the original shape. If the scale factor is a whole number, then the rectangle is an enlargement of the original rectangle.

Q: What is the scale factor?

A: The scale factor is the ratio of the length of the corresponding sides of the enlarged shape to the original shape. For example, if we enlarge a rectangle by a scale factor of 2, the length and width of the enlarged rectangle will be twice the length and width of the original rectangle.

Q: How do I calculate the scale factor?

A: To calculate the scale factor, you need to divide the length of the corresponding side of the enlarged shape by the length of the corresponding side of the original shape. For example, if the length of the original rectangle is 4 ft and the length of the enlarged rectangle is 8 ft, the scale factor would be 8/4 = 2.

Q: What if the scale factor is not a whole number?

A: If the scale factor is not a whole number, then the rectangle is not an enlargement of the original rectangle. This means that the rectangle has been distorted or transformed in some way.

Q: Can a rectangle be an enlargement of another rectangle if the scale factor is not a whole number?

A: No, a rectangle cannot be an enlargement of another rectangle if the scale factor is not a whole number. This is because the ratio of the length to the width would not remain the same.

Q: What if the dimensions of the rectangles are not given?

A: If the dimensions of the rectangles are not given, you cannot determine if one rectangle is an enlargement of another rectangle. You would need to have the dimensions of both rectangles to calculate the scale factor.

Q: Can a rectangle be an enlargement of another rectangle if the original rectangle is not a rectangle?

A: No, a rectangle cannot be an enlargement of another rectangle if the original rectangle is not a rectangle. This is because the definition of an enlargement requires that the original shape be a rectangle.

Conclusion

In conclusion, we hope that this Q&A section has helped to clarify any doubts and provide additional information on the topic of enlargements of rectangles. If you have any further questions, please don't hesitate to ask.

Final Answer

The final answer is rectangle B.