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Omni-MATH / A regular dodecahedron is projected orthogonally onto a plane, and its image is…

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problem

A regular dodecahedron is projected orthogonally onto a plane, and its image is an nn-sided polygon. What is the smallest possible value of nn ?
Plain-text mathematical notation (without MathML)
A regular dodecahedron is projected orthogonally onto a plane, and its image is an n-sided polygon. What is the smallest possible value of n ?
Original LaTeX notation
A regular dodecahedron is projected orthogonally onto a plane, and its image is an $n$-sided polygon. What is the smallest possible value of $n$ ?

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