Question

Line $m$ is parallel to line $n$ and the third line $l$ is the transverse line as given in the figure below

Here, angle $x\&y$ areangles.

Answer 1

When two lines are parallel to each other, and the third line is the transverse to the parallel lines, the angles formed in the same relative positions are known as corresponding angles.

we can see the examples,
In the above figure, lines $p\text{and}q$ are parallel to each other and the line $r$ is the transverse line. Angles $\alpha \text{and}\beta$ are angles on the relatively same positions so these angles are Corresponding angles and are always equal to each other.
Hence, correct answer is Corresponding angles which are equal.