Question

hannah graphs a right triangle as shown, and then she applies the translation (x + 7, y - 8). what is the length of the horizontal base of the image? 10 units 11 units 3 units 2 units

Explanation:

Step1: Observe original triangle

By counting grid - squares, the length of the horizontal base of the original right - triangle is 2 units.

Step2: Recall property of translation

Translation $(x + 7,y - 8)$ is a rigid transformation. Rigid transformations (translations, rotations, reflections) preserve the lengths of line - segments.

Answer:

2 units