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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' a0 |0 D9 c. E3 f( ?5 T0 atangent  
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/ {$ j9 z/ O* g: u/ _3 X$ D7 V* U5 p (geometry) a straight line that touches the outside of a curve but does not cross it