Question

question 7 of 10
which of the following does not describe a rigid motion transformation?
a. reflecting a figure across the x - axis
b. translating a figure 2 units left
c. rotating a figure 90 degrees
d. dilating a figure by a scale factor of one half

Explanation:

Rigid motion (isometry) preserves shape and size. Reflection (A), translation (B), and rotation (C) are rigid motions. Dilation (D) changes size (scale factor ≠ 1), so it's not a rigid motion.

Answer:

D. Dilating a figure by a scale factor of one half