This book goes through a visual and algebraic discovery of both the midpoint formula and the distance formula. It contains review materials like the Pythagorean Theorem and finding a mean in the warm-up, and some closing questions in the exit ticket. The book also contains challenge problems that extend these topics to 3D. [br][br]We believe this book would work well for an advanced activity for 8th grade math, a "grade-level" activity for high school geometry, or a bit of review for students who are past standard high school geometry and more interested in how to apply these topics in 3D.