Lines and Symmetry — MYP 5 Criterion B Investigation (Coordinate Geometry)A complete, ready-to-teach mathematical investigation that turns the symmetry of regular polygons into a guided discovery about the equations of straight lines. Students start from a square, move to an equilateral triangle, build to a regular hexagon, and finish by generalising to any regular n-gon — discovering along the way how slope and y-intercept are governed by a shape's symmetry.Designed around the IB MYP Mathematic