In this special Pi Day episode of MathsTalk, host Leanne McMahon, AMSI’s school maths advisor, takes listeners on an engaging journey into the world of Pi. She explains what Pi is and how it is used in basic geometry, explores its irrational and transcendental nature, and discusses its importance in both mathematics and real-world applications. Leanne also shares fun facts about Pi—from ancient approximations to modern Pi recitation contests—and offers a variety of creative activities for teachers and parents to celebrate Pi Day in the classroom.