90-Degree Clockwise Rotation: What's My Rule #5

This example demonstrates a 90-degree clockwise rotation of point A to point B about a fixed center in the coordinate plane, illustrating the geometric phenomenon of planar rotation and the resulting positional relationship between pre-image and image. Core mathematical concepts include coordinate geometry, plane rotation transformations, 90-degree angles, clockwise direction, and coordinate transformation rules. Construction highlights: based on the provided construction summary, the example uses objects A and B; in GeoGebra, B is constructed as the image of A under a 90-degree clockwise rotation about a chosen center, with the coordinate axes available to observe how coordinates change under the transformation. Suitable for middle school and high school geometry instruction, classroom demonstrations, and inquiry-based “guess the rule” activities, helping students develop dynamic intuition and reasoning skills for rigid transformations.