Math Problem Statement

Find the scale factor that was used in the dilation:

Solution

To determine the scale factor for the dilation, we need to compare the distances between corresponding points before and after the dilation.

From the image:

  • LL is mapped to LL',
  • MM is mapped to MM',
  • NN is mapped to NN'.

Let's calculate the distance between a pair of corresponding points. We will calculate the distance between MM and MM' before and after the dilation.

Coordinates of the points:

  • M=(3,4)M = (3, 4)
  • M=(6,8)M' = (6, 8)

We can calculate the scale factor by finding the ratio of the distances from the origin to the original point MM and the dilated point MM'.

  1. Distance from the origin to MM: d(M)=(30)2+(40)2=9+16=25=5d(M) = \sqrt{(3 - 0)^2 + (4 - 0)^2} = \sqrt{9 + 16} = \sqrt{25} = 5

  2. Distance from the origin to MM': d(M)=(60)2+(80)2=36+64=100=10d(M') = \sqrt{(6 - 0)^2 + (8 - 0)^2} = \sqrt{36 + 64} = \sqrt{100} = 10

The scale factor kk is the ratio of the distance from the origin to MM' over the distance to MM: k=d(M)d(M)=105=2k = \frac{d(M')}{d(M)} = \frac{10}{5} = 2

Conclusion:

The scale factor of the dilation is 2.

Do you want more details or have any questions?

Here are some related questions:

  1. How do you verify if the dilation is centered at the origin?
  2. Can a dilation have a fractional scale factor?
  3. How do you find the scale factor if the dilation is not centered at the origin?
  4. What happens to angles during a dilation?
  5. How does dilation affect the area of a shape?

Tip: In dilation, the corresponding sides of the preimage and image are proportional by the scale factor, but angles remain unchanged.

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Math Problem Analysis

Mathematical Concepts

Dilation
Transformations
Geometry
Ratios

Formulas

Distance formula: d = √((x2 - x1)^2 + (y2 - y1)^2)
Scale factor: k = distance_after / distance_before

Theorems

Dilation Theorem

Suitable Grade Level

Grades 8-10