What transformations were made to triangle ABC to produce triangle XYZ? Assess whether the two triangles are congruent. How do you know? Show your work.

Triangle ABC:
Point A: (-5, 2)
Point B: (-3, 2)
Point C: (-3, 5)

Triangle XYZ:
Point X: (0, -6)
Point Y: (0, -4)
Point Z: (-3, -4)

1 answer

To determine the transformations made to triangle ABC to produce triangle XYZ, we will first analyze the coordinates of both triangles.

Coordinates of Triangle ABC:

  • Point A: (-5, 2)
  • Point B: (-3, 2)
  • Point C: (-3, 5)

Coordinates of Triangle XYZ:

  • Point X: (0, -6)
  • Point Y: (0, -4)
  • Point Z: (-3, -4)

Step 1: Find the transformations

**1. Translation: To transform triangle ABC to triangle XYZ, we can start by examining if a translation has occurred.

Let's determine the translation vector by comparing the coordinates of corresponding points:

  • From A (-5, 2) to X (0, -6):
    • The change in x is \( 0 - (-5) = 5\)
    • The change in y is \( -6 - 2 = -8\)

Thus, the translation vector is (5, -8).

Let's check if this translation works for the other points:

  • From B (-3, 2) to Y (0, -4):
    • The change in x is \( 0 - (-3) = 3\)
    • The change in y is \( -4 - 2 = -6\)

This indicates that we have an inconsistency.

  • From C (-3, 5) to Z (-3, -4):
    • The change in x is \( -3 - (-3) = 0\)
    • The change in y is \( -4 - 5 = -9\)

Step 1: Check the differences in coordinates:

Find lengths of sides:

Length of AB: \[ AB = \sqrt{((-3) - (-5))^2 + (2 - 2)^2} = \sqrt{(2)^2 + (0)^2} = 2 \]

Length of BC: \[ BC = \sqrt{((-3) - (-3))^2 + (5 - 2)^2} = \sqrt{(0)^2 + (3)^2} = 3 \]

Length of CA: \[ CA = \sqrt{((-5) - (-3))^2 + (2 - 5)^2} = \sqrt{(-2)^2 + (-3)^2} = \sqrt{4 + 9} = \sqrt{13} \]

Lengths of sides for triangle XYZ:

Length of XY: \[ XY = \sqrt{(0 - 0)^2 + (-4 - (-6))^2} = \sqrt{0 + (2)^2} = 2 \]

Length of YZ: \[ YZ = \sqrt{(-3 - 0)^2 + (-4 - (-4))^2} = \sqrt{(-3)^2 + 0} = 3 \]

Length of ZX: \[ ZX = \sqrt{(-3 - 0)^2 + (-6 - (-4))^2} = \sqrt{(-3)^2 + (-2)^2} = \sqrt{9 + 4} = \sqrt{13} \]

Step 2: Compare side lengths

Now we have the lengths of the sides:

Triangle ABC:

  • AB = 2
  • BC = 3
  • CA = \(\sqrt{13}\)

Triangle XYZ:

  • XY = 2
  • YZ = 3
  • ZX = \(\sqrt{13}\)

Conclusion: Assessment of Congruence

Since triangle ABC and triangle XYZ have all corresponding sides that are equal:

  • \(AB = XY\)
  • \(BC = YZ\)
  • \(CA = ZX\)

This means triangle ABC is congruent to triangle XYZ by the Side-Side-Side (SSS) criterion for congruence.

Final Answer:

Transformations: A translation of \( (5, -8)\) has been applied with each side length matching. Conclusion: Triangle ABC is congruent to triangle XYZ.