Students practice rigid motion transformations.
Which of the following transformations preserve congruence?
Triangle ABC is reflected over the y-axis to form triangle DEF. Which statement is true?
Trapezoid ABCD was rotated 90° counterclockwise about the origin to create trapezoid A'B'C'D'. Will the new image have a different shape or size from the original? Justify your answer. (Write in complete sentences)
Translate triangle ABC using the following rule, (x-3, y+1).
Reflect triangle ABC over the x-axis and label the corresponding vertices.
Square ABCD is reflected over the y-axis to create square A'B'C'D'. Which rule best describes this reflection?


A transformation is applied to a new figure. Which transformation does NOT preserve congruence?
What is the algebraic rule for rotating a figure 90° counter clockwise?