Identifying Rotations

Identifying Rotations

Introduction

A rotation turns a figure around a fixed point. By comparing the coordinates of a figure and its image, we can identify the rotation that maps one figure onto the other. Th...

Lena is working on a geometry assignment. She needs to determine how triangle JKL was rotated to form its image, triangle J′K′L′.

Looking at the image, Lena thinks it is a 90-degree counterclockwise rotation. Let’s verify this by comparing corresponding coordinates.

By comparing them, we see that each point follows the rule (x, y) ...