Question

which triangle is the pre - image? purple triangle blue triangle

Explanation:

Step1: Understand pre - image concept

Pre - image is the original figure before transformation. Usually, the figure with unprimed vertices (A, B, C) is the pre - image and the figure with primed vertices (A', B', C') is the image after transformation.

Step2: Identify the pre - image

The purple triangle has vertices A, B, C and the blue triangle has vertices A', B', C'. So the purple triangle is the pre - image.

Answer:

purple triangle