Question

1. here are 4 triangles that have each been transformed by a different transformation. which transformation is not a rigid transformation? (from unit 1, lesson 10.)

Explanation:

Step1: Recall the definition of rigid transformation

A rigid transformation (isometry) preserves the shape and size of a figure. It includes translations, rotations, and reflections.

Step2: Analyze each option

• Option A: It is a rotation. Rotation is a rigid transformation as it preserves the shape and size of the triangle.
• Option B: It is a translation. Translation is a rigid transformation as it preserves the shape and size of the triangle.
• Option C: It is a reflection. Reflection is a rigid transformation as it preserves the shape and size of the triangle.
• Option D: It is a dilation (enlargement or reduction). Dilation changes the size of the figure and is not a rigid transformation.

Answer:

D