Question: A triangle △ABC has vertices: A(1,2), B(4,2), C(2.5,5). The triangle is first dilated from the origin by a scale factor of 2, then reflected across the y-axis. A student claims that the final image is congruent to the original triangle. Which of the following statements best evaluates the student's claim?
A) The student is correct because dilation and reflection preserve both shape and size.
B) The student is incorrect because dilation changes the shape of the triangle.
C) The student is incorrect because dilation changes the size, so the image is not congruent to the original.
D) The student is correct because all transformations preserve congruence.
Correct answer: C
Grade: 8 | Topic: Geometry | Difficulty: Hard | Standard: 8. G. A. 3