Triangle%C2%A0 PQR %C2%A0is reflected over a vertical line of reflection to create triangle%C2%A0 P′Q′R′ .%C2%A0What are the coordinates of point%C2%A0 R′ ?

5 answers

To determine the coordinates of point R' after triangle PQR is reflected over a vertical line of reflection, we need to know the original coordinates of point R and the equation of the vertical line of reflection.

  1. Identify the vertical line of reflection: Let's assume the line of reflection is given by the equation \( x = a \).

  2. Find the original coordinates of point R: Let's say the coordinates of point R are \( (x_R, y_R) \).

  3. Determine the reflected coordinates: When reflecting over a vertical line \( x = a \), the x-coordinate of the point R will change, while the y-coordinate will remain the same.

    The new x-coordinate \( x_{R'} \) can be found using the formula: \[ x_{R'} = 2a - x_R \] The y-coordinate remains the same: \[ y_{R'} = y_R \]

  4. Result: Thus, the coordinates of point R' after reflection would be: \[ R' = (2a - x_R, y_R) \]

If you provide the original coordinates of R and the line of reflection, I can give you the exact coordinates of R'.

When R preimage is (-11,1)

Given the coordinates of point \( R \) as \( (-11, 1) \), we need to reflect this point over a vertical line. Since you haven't provided a specific equation for the line of reflection, let’s assume \( x = a \) represents the vertical line of reflection.

  1. Original coordinates of \( R \): \[ R = (-11, 1) \]

  2. Reflection over the vertical line \( x = a \):

    The formula to find the new x-coordinate after reflection over the line \( x = a \) is: \[ x_{R'} = 2a - x_R \] where \( x_R = -11 \).

  3. New coordinates of \( R' \): \[ y_{R'} = y_R = 1 \] Thus, \[ R' = (2a - (-11), 1) = (2a + 11, 1) \]

To calculate the exact coordinates of \( R' \), you will need to specify the value of \( a \), the x-coordinate of the vertical line of reflection. Please provide that value, and I'll give you the exact coordinates of \( R' \).

For%C2%A0 △FUN ,%C2%A0 x=−1 .%C2%A0What are the coordinates for F' after a reflection? (1 point) Responses F′(−1,4) upper F prime left parenthesis negative 1 comma 4 right parenthesis F′(3,5) upper F prime left parenthesis 3 comma 5 right parenthesis F′(5,−5) upper F prime left parenthesis 5 comma negative 5 right parenthesis F′(−5,−5)

To reflect point \( F \) over the vertical line \( x = -1 \), we need to know the original coordinates of point \( F \). However, since you did not provide these coordinates directly, I can show you how to find the reflected coordinates based on an assumption of what \( F \) could be, based on the options you provided.

Reflection process:

  1. The general formula for the reflection of a point \( (x_F, y_F) \) across the vertical line \( x = -1 \) is given by: \[ x_{F'} = 2(-1) - x_F \] \[ y_{F'} = y_F \]

  2. This simplifies to: \[ x_{F'} = -2 - x_F \]

Now, we can test the given options to see which one could be a valid reflection:

  1. Option F′(−1,4):

    • \( x_{F'} = -1 \) which would yield \( x_F = -2 \); therefore \( F(-2, 4) \)
  2. Option F′(3,5):

    • \( x_{F'} = 3 \) which would yield \( x_F = -8 \); therefore \( F(-8, 5) \)
  3. Option F′(5,−5):

    • \( x_{F'} = 5 \) which would yield \( x_F = -12 \); therefore \( F(-12, -5) \)
  4. Option F′(−5,−5):

    • \( x_{F'} = -5\) which would yield \( x_F = 2 \); therefore \( F(2, -5) \)

Now we analyze whether the original points correspond correctly to their reflected points:

  • For option F'(-1, 4), if \( F = (-2, 4) \), then reflecting across \( x = -1 \): \[ x_{F'} = 2(-1) - (-2) = -2 + 2 = -1 \] (So this option works.)

  • The other options do not satisfy the condition for reflection correctly based on how they would result from reflection.

Thus, if \( F \) was originally \( (-2, 4) \), reflecting across \( x = -1 \) gives us \( F'(-1, 4) \).

Conclusion:

The correct coordinates for \( F' \) after reflection would be F′(−1, 4).