Pregunta
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14. If a figure is translated with the rule \( T_{\langle-5,3\rangle} \), which translation moves the image back to the original position? (A) \( T_{\langle 5,-3\rangle} \) (B) \( T_{\langle-5,3\rangle} \) (C) \( T_{\langle 0,5\rangle} \) (D) \( T_{\langle-5,0\rangle} \)

Ask by Stuart Hodges. in the United States
Feb 20,2025

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The correct translation to move the image back to the original position is \( T_{\langle 5, -3 \rangle} \).

Solución

To determine which translation moves the image back to the original position after a translation defined by \( T_{\langle-5,3\rangle} \), we need to understand how translations work. 1. **Understanding the Translation**: The translation \( T_{\langle-5,3\rangle} \) means that every point of the figure is moved 5 units to the left (negative x-direction) and 3 units up (positive y-direction). 2. **Finding the Inverse Translation**: To move the image back to its original position, we need to apply the opposite translation. The opposite of moving left by 5 units is moving right by 5 units, and the opposite of moving up by 3 units is moving down by 3 units. 3. **Calculating the Inverse Translation**: Therefore, the translation that would move the image back to the original position is: \[ T_{\langle 5, -3 \rangle} \] 4. **Identifying the Correct Option**: Now, we can compare this with the provided options: - (A) \( T_{\langle 5,-3\rangle} \) - This is the correct translation. - (B) \( T_{\langle-5,3\rangle} \) - This is the original translation. - (C) \( T_{\langle 0,5\rangle} \) - This does not move the figure back to the original position. - (D) \( T_{\langle-5,0\rangle} \) - This also does not move the figure back to the original position. Thus, the correct answer is: **(A) \( T_{\langle 5,-3\rangle} \)**.

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Bonus Knowledge

To move the figure back to its original position after a translation of \( T_{\langle-5,3\rangle} \), you would need to apply the opposite translation, which reverses the original change. Therefore, the correct translation that does this is \( T_{\langle 5,-3\rangle} \). This translation moves the figure 5 units to the right and 3 units down, effectively canceling out the previous movement. When dealing with translations, it’s important to consider the vectors involved. Many students mistakenly think that applying the same translation again will return the figure to its original position, but instead, remember that you need the exact opposite vector to achieve that perfect reset.

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