give one pair of vertical angles and one pair of supplementary angles shown in the figure below. (a) vertical angles: ∠□ and ∠□ (b) supplementary angles: ∠□ and ∠□

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# Brief Explanations:
- **Vertical angles**: Vertical angles are pairs of opposite angles formed by the intersection of two lines. In the given figure, $\angle2$ and $\angle3$ (or $\angle1$ and $\angle4$, $\angle6$ and $\angle7$, $\angle5$ and $\angle8$) are opposite each other at the intersection of lines $l$ and the transversal.
- **Supplementary angles**: Supplementary angles are two angles whose sum is $180^{\circ}$. Adjacent angles that form a linear - pair (e.g., $\angle1$ and $\angle2$, $\angle2$ and $\angle4$, $\angle4$ and $\angle3$, $\angle3$ and $\angle1$, $\angle5$ and $\angle6$, $\angle6$ and $\angle8$, $\angle8$ and $\angle7$, $\angle7$ and $\angle5$) are supplementary.

# Answer:
(a) Vertical angles: $\angle2$ and $\angle3$ (or other valid pairs like $\angle1$ and $\angle4$, $\angle6$ and $\angle7$, $\angle5$ and $\angle8$)
(b) Supplementary angles: $\angle1$ and $\angle2$ (or other valid linear - pair pairs)

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