Symmetry of a Multi-Ring Fence Design

This GeoGebra example demonstrates a fence design composed of several rings, inviting learners to investigate whether the entire pattern possesses reflectional symmetry and how many lines of symmetry it has. The core mathematical concepts include reflectional symmetry, geometric transformations, circle geometry, and the relationship between local symmetry of individual rings and global symmetry of the composite design. Construction uses GeoGebra commands Circle to draw the rings, Point to define control points A, B, C, D, and E, Line to construct the axis line a, and Mirror to perform reflection operations, with an image object pic1 overlaid for visual context. The resource is suitable for middle school and high school geometry classes, serving as a dynamic demonstration or inquiry-based activity for symmetry and transformation topics.