Reflecting across a mirror line
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This example demonstrates the reflection transformation of points, polygons, and figures across a mirror line, involving core math concepts like symmetry, coordinate geometry, and transformation. It uses commands Polygon, Line, Mirror to create objects such as points A_1, B_1, C, D, E, polygon poly1, and mirror line Mirror. Suitable for middle school and above students learning geometric transformations and applications of symmetry and coordinate geometry.
GeoGebra Commands & Parameters
Polygon(A_1, B_1, C, D, E) → poly1, a, b, c, d, eLine(A, B) → MirrorLineMirror(A_1, MirrorLine) → A'Mirror(B_1, MirrorLine) → B'Mirror(C, MirrorLine) → C'Mirror(D, MirrorLine) → D'Mirror(E, MirrorLine) → E'Polygon(A', B', C', D', E') → poly1', a', b', c', d', e'