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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7 U2 t0 ?/ ~5 w1 z+ ~  K+ etangent  
1 a# F  A# l! A  Y noun
9 T4 h: \7 W& x/ s& s$ h# z* C (geometry) a straight line that touches the outside of a curve but does not cross it