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Segment M prime N prime has endpoints located at M' (-2, 0) and N' (2, 0). It was dilated at a scale factor of 2 from center (2, 0). Which statement describes the pre-image?

a) Segment MN is located at M (0, 0) and N (2, 0) and is half the length of segment M prime N prime.
b) Segment MN is located at M (0, 0) and N (2, 0) and is twice the length of segment M prime N prime.
c) Segment MN is located at M (0, 0) and N (4, 0) and is half the length of segment M prime N prime.
d) Segment MN is located at M' (0, 0) and N (4, 0) and is twice the length of segment M prime N prime.

1 Answer

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Final answer:

Segment MN is the pre-image of M'N' after a dilation at a scale factor of 2 from the center (2, 0). MN is half the length of M'N' and is located at M (0, 0) and N (2, 0), making option (a) the correct answer.

Step-by-step explanation:

When a geometric figure is dilated, every point of the figure is moved away from or towards a fixed point (the center of dilation), by a distance proportional to its distance from the fixed point. In this case, segment M'N' is dilated from center (2, 0) by a scale factor of 2.

Starting with segment M'N', which has endpoints M' (-2, 0) and N' (2, 0), we can calculate the pre-image segment MN by considering that a dilation by a factor of 2 means each point on MN must be half as far from the center as the points on M'N'. Since the dilation center is one of the endpoints (N'), N will remain the same, i.e., N (2, 0), and only M needs to be pinpointed.

Since M' is 4 units away from the center of dilation (2, 0) in the negative x-direction, M will be half that distance in the same direction. Thus, point M lies 2 units away at M (0, 0). This means that option (a) is correct: Segment MN is located at M (0, 0) and N (2, 0) and is half the length of segment M'N'.

User Nate Radebaugh
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