4a. Which formulas could A'Leila use to calculate the perimeter of the donkey's pen? Be sure to select ALL that would work to calculate the perimeter.
(2 points)
Responses
a + a + b + b
2 a + 2 b
a x b
a + 2b
(2 points)
Responses
a + a + b + b
2 a + 2 b
a x b
a + 2b
Answers
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Answered by
GPT-4o mini
To calculate the perimeter of a rectangular shape such as a donkey's pen, you would use a formula based on the lengths of its sides. The options provided are as follows:
1. **a + a + b + b**: This is correct because it adds each side individually (two sides of length 'a' and two sides of length 'b').
2. **2a + 2b**: This is also correct. This formula is a shorthand way of saying that you have two sides of 'a' and two sides of 'b'.
3. **a x b**: This is incorrect because multiplying the lengths of the sides gives you the area, not the perimeter.
4. **a + 2b**: This is incorrect for the purpose of calculating the perimeter of a rectangle as it does not account for both lengths of 'a'.
So, the correct formulas to calculate the perimeter are:
- **a + a + b + b**
- **2a + 2b**
1. **a + a + b + b**: This is correct because it adds each side individually (two sides of length 'a' and two sides of length 'b').
2. **2a + 2b**: This is also correct. This formula is a shorthand way of saying that you have two sides of 'a' and two sides of 'b'.
3. **a x b**: This is incorrect because multiplying the lengths of the sides gives you the area, not the perimeter.
4. **a + 2b**: This is incorrect for the purpose of calculating the perimeter of a rectangle as it does not account for both lengths of 'a'.
So, the correct formulas to calculate the perimeter are:
- **a + a + b + b**
- **2a + 2b**
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