Math Problem Statement

Find the scale factor of the dilation using the corresponding points D and G, or any other pairs of corresponding points like E and F on the coordinate grid.

Solution

The image shows a geometry problem asking to find the scale factor of a dilation on a coordinate grid. To find the scale factor, you need to compare the lengths of corresponding segments of the pre-image and image after the dilation. The dilation here involves two triangles, marked with corresponding points on the graph.

Here's how to approach the problem:

  1. Identify two corresponding points: For example, compare point D on the smaller triangle with point G on the larger triangle, or any other pair of corresponding points like E and F.

  2. Measure the distance between these points:

    • For point D (pre-image) and point G (image), count the grid units along the x and y axes.
    • Do the same for corresponding points in the original and the dilated triangles.
  3. Find the ratio:

    • Use the ratio of the distances between corresponding points to find the scale factor.
    • The formula is: Scale Factor=Distance between points on the imageDistance between points on the pre-image\text{Scale Factor} = \frac{\text{Distance between points on the image}}{\text{Distance between points on the pre-image}}

Once you have the distances, simplify the ratio to get the scale factor, which can be expressed as a fraction, improper fraction, or whole number as requested.

Would you like more detailed steps on calculating the exact distances from the image? Here are some related questions:

  1. What is the distance formula for points on a graph?
  2. How can you find the scale factor if the dilation is a reduction?
  3. How do dilations affect the slope of lines in geometry?
  4. What is the difference between a dilation with a scale factor greater than 1 and less than 1?
  5. How can you find the center of dilation on a graph?

Tip: Make sure to count the units precisely along the grid lines when measuring distances between corresponding points.

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Math Problem Analysis

Mathematical Concepts

Geometry
Dilations
Scale Factor
Coordinate Plane

Formulas

Scale Factor = Distance between points on the image / Distance between points on the pre-image

Theorems

Dilation Theorem
Similarity in Geometry

Suitable Grade Level

Grades 7-10