Question

1. here are 4 triangles that have each been transformed by a different transformation. which transformation is not a rigid transformation?

Explanation:

Step1: Recall rigid - transformation definition

Rigid transformations (translations, rotations, reflections) preserve side - lengths and angles. Dilation is not a rigid transformation as it changes the size of the figure.

Step2: Analyze each option

In option A, it looks like a rotation. In option B, it appears to be a translation. In option C, it seems to be a reflection. In option D, the triangle has changed in size, which indicates a dilation.

Answer:

D.