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Omni-MATH / Let ℓ and m be two non-coplanar lines in space, and let P₁ be a point on ℓ. Let P₂ be the point on m closest to P₁,P₃ be the point on ℓ closest to P₂,P₄ be the point on m closest t…

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problem

Let ℓ\ell and mm be two non-coplanar lines in space, and let P1P_{1} be a point on ℓ\ell. Let P2P_{2} be the point on mm closest to P1,P3P_{1}, P_{3} be the point on ℓ\ell closest to P2,P4P_{2}, P_{4} be the point on mm closest to P3P_{3}, and P5P_{5} be the point on ℓ\ell closest to P4P_{4}. Given that P1P2=5,P2P3=3P_{1} P_{2}=5, P_{2} P_{3}=3, and P3P4=2P_{3} P_{4}=2, compute P4P5P_{4} P_{5}.
Plain-text mathematical notation (without MathML)
Let ℓ and m be two non-coplanar lines in space, and let P₁ be a point on ℓ. Let P₂ be the point on m closest to P₁,P₃ be the point on ℓ closest to P₂,P₄ be the point on m closest to P₃, and P₅ be the point on ℓ closest to P₄. Given that P₁P₂=5,P₂P₃=3, and P₃P₄=2, compute P₄P₅.
Original LaTeX notation
Let $\ell$ and $m$ be two non-coplanar lines in space, and let $P_{1}$ be a point on $\ell$. Let $P_{2}$ be the point on $m$ closest to $P_{1}, P_{3}$ be the point on $\ell$ closest to $P_{2}, P_{4}$ be the point on $m$ closest to $P_{3}$, and $P_{5}$ be the point on $\ell$ closest to $P_{4}$. Given that $P_{1} P_{2}=5, P_{2} P_{3}=3$, and $P_{3} P_{4}=2$, compute $P_{4} P_{5}$.

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