Education Technology

The Tale of Two Tangents

Activity Overview

This activity allows students to investigate the relationship between the angle formed by two tangents to a circle and the arcs they intercept.

Before the Activity

Review tangents to circles. Decide how much construction you want the students to do and how much you want to them as a start.

Download the files and alter as necessary.

During the Activity

Lead the students through the construction and measuring if desired. For a shorter activity, send students the student.tns file with finished construction to make observations.

After the Activity

Do several examples solving for the angle between the tangents.