Do you have a sign-up lab in your school?
This is a hands on activity for your students.
Greetings from Alaska,
We use Geometer's Sketchpad (GSP) for dynamic constructions throughout the year. This activity pairs with section 10.1 of McDougal Littel geometry: Circles & Tangents
This file was created in version 4.07. You may use a higher version. I load the file file to a local server. Students download the file, perform the instructed activities, then send the modified file to my dropbox. Lab computers must have a legal copy of GSP installed. I perform the instructions live. The recorded YouTube instructions are for make-up purposes.
The GSP file contains four scripts (custom tools) These tools include right angle symbol and three different tick marks for segments.