Math Problem Statement

Write the coordinates of the vertices after a dilation with a scale factor of 1/2 centered at the origin.

Solution

To solve the problem of dilating the vertices of the triangle by a scale factor of 12\frac{1}{2} centered at the origin, let's follow the steps:

Step 1: Identify the Coordinates of the Original Vertices

The vertices of the triangle are labeled as AA, BB, and CC. From the graph, the coordinates appear to be:

  • A(6,6)A (-6, -6)
  • B(0,6)B (0, -6)
  • C(6,10)C (-6, -10)

Step 2: Apply the Dilation Formula

The dilation formula for a point (x,y)(x, y) with a scale factor kk centered at the origin is:

(x,y)=(kx,ky)(x', y') = (k \cdot x, k \cdot y)

Here, the scale factor k=12k = \frac{1}{2}.

Step 3: Calculate the New Coordinates

  • For A(6,6)A (-6, -6):

A=(12(6),12(6))=(3,3)A' = \left( \frac{1}{2} \cdot (-6), \frac{1}{2} \cdot (-6) \right) = (-3, -3)

  • For B(0,6)B (0, -6):

B=(120,12(6))=(0,3)B' = \left( \frac{1}{2} \cdot 0, \frac{1}{2} \cdot (-6) \right) = (0, -3)

  • For C(6,10)C (-6, -10):

C=(12(6),12(10))=(3,5)C' = \left( \frac{1}{2} \cdot (-6), \frac{1}{2} \cdot (-10) \right) = (-3, -5)

Step 4: New Coordinates of the Dilated Vertices

  • A=(3,3)A' = (-3, -3)
  • B=(0,3)B' = (0, -3)
  • C=(3,5)C' = (-3, -5)

These are the coordinates of the vertices after dilation with a scale factor of 12\frac{1}{2}.


Would you like further details or clarifications on this solution?

Related Questions:

  1. How do you find the image of a point under dilation with a different scale factor?
  2. What is the effect of dilation on the area of a triangle?
  3. How would the result change if the dilation was centered at a different point?
  4. Can dilation change the orientation of a figure?
  5. How would a dilation with a scale factor greater than 1 affect the coordinates?

Tip: When dilating around the origin, multiplying each coordinate by the scale factor is all that’s needed!

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Math Problem Analysis

Mathematical Concepts

Dilation
Coordinate Geometry
Transformation

Formulas

Dilation formula: (x', y') = (k * x, k * y) where k is the scale factor

Theorems

Dilation centered at the origin

Suitable Grade Level

Grades 8-10