A generalized Petersen graph is a graph with $2n$ vertices, where each vertex has degree 3 and there are $3n$ edges. A unit-distance graph is a graph with every edge of 1 unit length. We study the geometric transformation of a generalized Petersen graph into a generalized Petersen unit-distance graph and the rotation angles of the $n$-pointed star of the generalized Petersen unit-distance graph. Then, we obtain the properties of the generalized Petersen unit-distance graph and the rotation angles of the $n$-pointed star of the generalized Petersen unit-distance graph by using geometric transformations, trigonometric functions, and the rule of sine and cosine, along with similar polygons.
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