This document provides instruction on calculating the distance between points on the coordinate plane. It begins with an opening exercise asking students to calculate distances between towns located at road intersections. It then works through three examples of finding the length of line segments with endpoints on the x-axis, y-axis, and neither axis but along vertical or horizontal lines. Students are asked to identify the line, distances, locations, and do the calculation. Exercises have students find lengths of additional line segments, explaining how they can tell if each is vertical or horizontal. Real-world applications are discussed before an exit ticket is assigned.
