Math Problem Statement

Polygon ABCD will be dilated by one-half at the origin. Find the coordinates of polygon AʹBʹCʹDʹ.

Polygon ABCD will be dilated by one-half at the origin. Find the coordinates of polygon AʹBʹCʹDʹ.

Solution

To solve the problem, we perform the dilation of the polygon ABCD using the given scale factor of 12\frac{1}{2}, with the origin as the center of dilation. Each vertex's coordinates will be scaled by multiplying them by 12\frac{1}{2}. Let's determine the new coordinates for each point:

Step 1: Extract the coordinates of the vertices

From the graph:

  • A(0,0)A(0, 0)
  • B(2,2)B(2, 2)
  • C(4,0)C(4, 0)
  • D(2,2)D(2, -2)

Step 2: Apply the dilation

Using the formula for dilation at the origin: (x,y)=(12x,12y)(x', y') = \left( \frac{1}{2}x, \frac{1}{2}y \right)

  1. A(0,0)A(0,0)A(0, 0) \to A'(0, 0)
  2. B(2,2)B(1,1)B(2, 2) \to B'(1, 1)
  3. C(4,0)C(2,0)C(4, 0) \to C'(2, 0)
  4. D(2,2)D(1,1)D(2, -2) \to D'(1, -1)

Step 3: Resulting coordinates of AʹBʹCʹDʹ

The coordinates of the dilated polygon are: A(0,0),B(1,1),C(2,0),D(1,1)A'(0, 0), B'(1, 1), C'(2, 0), D'(1, -1)

Would you like further explanations or clarifications on how dilation works?


Here are 5 related questions to deepen your understanding:

  1. How would the coordinates change if the scale factor was 22 instead of 12\frac{1}{2}?
  2. What happens to the shape of a polygon under dilation?
  3. How do you determine the center of dilation from given coordinates?
  4. Can dilation result in a reflection? If yes, under what conditions?
  5. How is dilation different from translation or rotation?

Tip: Always check the proportionality of distances from the center of dilation to ensure the transformation is correct!

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Dilation
Scale Factor
Transformations

Formulas

(x', y') = (kx, ky), where k is the scale factor

Theorems

Dilation Theorem: Proportional transformation of all points from a center

Suitable Grade Level

Grades 8-10