Illusion of Rotation: Equilateral Triangles Circling Around a Circle

This example demonstrates an optical illusion where multiple equilateral triangles moving uniformly around a circle create the visual effect of continuous rotation. Core mathematical concepts include: geometric construction of equilateral triangles, rotation matrix transformations, parametric equations and sequence generation, and visual persistence effects. Construction key points: Use the Sequence command to generate multiple equilateral triangle objects, draw a reference circle with the Circle command, use matrix rotation transformations to control the position and angle changes of triangles, and implement dynamic demonstration with slider animations (button1, button2, speed). Suitable for teaching in middle school geometry modules and can be used in university linear algebra courses for intuitive demonstration of matrix transformations.