Reflections in a Coordinate Plane by Joy

This example demonstrates the reflection transformation of points and polygons in a coordinate plane across a line (mirror). Core math concepts include coordinate geometry, reflection symmetry, line equations, and polygon construction. It utilizes GeoGebra commands like Polygon, Line, and Mirror, along with objects such as A, B, C, D, E, poly1, a, b, c, d, e, F, G, f, A', B', C', D', E', poly1', a', b', c', d', e', g, h, i. Suitable for middle school and high school students learning coordinate geometry and geometric transformations, as well as high school math instruction on reflection properties.