Line Reflection Quiz: Mirror Checks in Coordinate Geometry

This GeoGebra example demonstrates how to perform line reflection (mirroring) in the coordinate plane and uses interactive quiz questions to check whether the reflected answers are correct. It focuses on key ideas such as line reflection symmetry, the relationship between a point and its mirror image, and coordinate geometry reasoning; it also aligns with the use of midline-style symmetry thinking and inequality/number-judgment style practice in randomly generated problems. The construction is driven by these commands and objects: Random to generate question parameters, If to branch into correct/incorrect feedback logic, Mirror to compute the reflected point geometry, and Textfield to display user-facing prompts and input guidance. The objects include generated parameters (n, a), reference/constructed coordinates (xC, yC), the reflecting line representation (d, f, A, A'), related point labels (b, c, B, C), plus an input box (InputBox1) and evaluation variables (correct, text1/text2/text3). Suitable for middle and high school learners to practice geometric transformations, especially reflection properties in coordinate settings, and for classroom or self-study quiz activities.