What was the geometry student looking for at the beach

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Q: What was the geometry student looking for at the beach?
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A: A tangent.
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# E$ q% \$ r/ mtangent  
1 E9 v6 M: t' G2 Y6 n" l  K8 a6 ] noun
: f5 `* I! W. ^: h- ^/ K2 D (geometry) a straight line that touches the outside of a curve but does not cross it