The mathematical symbol for the line XY is XY(a line on top it) . The first option
There are so many mathematical symbols use in geometry. They include ∠(angles), ⊥(perpendicular line), Δ(triangle), ≅(congruency) and many more.
Therefore, the symbol for the line XY is as follows;
XY(a line on top it)
It means line segment "XY"
In words, it is the line segment between X and Y
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