Write the coordinates of the vertices after a dilation with a scale factor of

1
2
,
centered at the origin.
P
'
,
Q
'
,
R
'
,
S
'
,

p = -10, -10
q = -10, 6
r = -8, 10
s = -8, -6

1 answer

To perform a dilation centered at the origin with a scale factor of \( \frac{1}{2} \), we multiply each coordinate of the original points by the scale factor.

The original coordinates of the vertices are:

  • \( P(-10, -10) \)
  • \( Q(-10, 6) \)
  • \( R(-8, 10) \)
  • \( S(-8, -6) \)

Now, we will apply the dilation:

  1. For \( P' \): \[ P' = \left( -10 \times \frac{1}{2}, -10 \times \frac{1}{2} \right) = \left( -5, -5 \right) \]

  2. For \( Q' \): \[ Q' = \left( -10 \times \frac{1}{2}, 6 \times \frac{1}{2} \right) = \left( -5, 3 \right) \]

  3. For \( R' \): \[ R' = \left( -8 \times \frac{1}{2}, 10 \times \frac{1}{2} \right) = \left( -4, 5 \right) \]

  4. For \( S' \): \[ S' = \left( -8 \times \frac{1}{2}, -6 \times \frac{1}{2} \right) = \left( -4, -3 \right) \]

Thus, the coordinates of the dilated vertices are:

  • \( P'(-5, -5) \)
  • \( Q'(-5, 3) \)
  • \( R'(-4, 5) \)
  • \( S'(-4, -3) \)