Line Reflection Questions V2

①This example demonstrates the reflection of a randomly generated triangle across a straight line in the coordinate plane, with interactive input boxes for users to verify reflection properties. ②Core mathematical concepts include reflection (axial symmetry) about a line, coordinate transformations of points, correspondence between a triangle and its mirror image, and the invariant properties of reflection such as distance and angle preservation. ③Construction highlights: using GeoGebra commands Random to generate random triangle vertices, If for conditional logic, Mirror to perform the reflection, Textfield and InputBox1 to create input fields, button1 to trigger checking, correct variable to evaluate user responses, and text1, text2, text3 for feedback messages. ④Suitable for upper middle school or high school students to reinforce knowledge of axial symmetry and coordinate geometry, and can serve as an interactive practice tool for teachers in classroom demonstrations or for students' self-directed exploration of reflection properties.