Question

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

Explanation:

Step1: Define rigid - motion

Rigid - motion preserves distance and angle measures.

Step2: Analyze rotation

Rotating a figure 90 degrees (Option A) preserves distance and angle measures.

Step3: Analyze dilation

Dilating a figure (Option B) changes the size of the figure. When dilating by a scale factor other than 1, distances between points change, so it is not a rigid - motion.

Step4: Analyze translation

Translating a figure 2 units left (Option C) just moves the figure without changing its size or shape, preserving distance and angle measures.

Step5: Analyze reflection

Reflecting a figure across the x - axis (Option D) preserves distance and angle measures.

Answer:

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