Charlie is helping his brother Don find the location of a killer. To do this, Charlie needs to find the center of an irregular region - he suspects the center may represent the location of the killer's residence. To explain the process to Don, Charlie shows him a sprinkler spraying water in a circular path. Charlie states that even if the sprinkler can't be seen, by analyzing where the water drops land and knowing the path the sprinkler follows, the position of the sprinkler can be determined.
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.