This is a complete lesson plan for a Sangaku project that include a Power Point Presentation to introduce the topic and start some class activities, a problem set with answer key, and a rubric. This project that can be used on its own as an introduction to these eye catching, challenging problems. It can be also a part of a Global Mathematics or a History of Mathematics unit or course, or as a self-standing study.Sangaku problems, often written "san gaku," are geometric problems of the type fou