Students in Mrs. Joan DeForest’s geometry class at Clinton County High School celebrated Pi Day on Wednesday, March, 14, 2018. Pi Day is celebrated on March 14th (3.14) each year around the world. Pi (Greek letter “π”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.14159. The students used yarn and a ruler to measure different circular objects in the classroom, including cans, bottles, plates, and paper towel rolls. Using the equation circumference / diameter = π x diameter / diameter, students solved for π (π = circumference / diameter). They discovered that regardless of the circumference and diameter of the circular object, the ratio was always 3.14 or π (pi).