What was the geometry student looking for at the beach

失落的我

Q: What was the geometry student looking for at the beach?
* v( c' n3 J8 Y. v# ^7 D
! J7 l( B9 G! `% R0 J% OA: A tangent.
) X* x) R; p4 b% E6 U3 y8 w
* C0 g. {' a2 G0 X- F: Itangent  
2 N8 R2 g9 e5 w( j. p* N5 w noun
- b8 [, i/ y6 T6 z (geometry) a straight line that touches the outside of a curve but does not cross it