Many famous and expensive art pieces are shown in art galleries around the world. The galleries can be represented as polygons, and you will find security guards in every gallery. However, how do you know how many guards are needed to secure the gallery? This question, also known as the "The Art Gallery Problem," asks for the minimum number of guards, and where they should be placed at vertices, so that the entire interior of a polygon can be viewed simultaneously.
Before the Activity
Download the attached PDF and look over the Teacher Page.
During the Activity
Discuss the materials from the Student Page with your class.
After the Activity
Encourage students to explore web sites and questions from the Extensions page.