Answer
$\angle$SON = $\angle$TOM
$\angle$TOS = $\angle$MON
Work Step by Step
Two angles that share the same number of degrees are congruent.
Vertical Angles are the pairs of opposite angles made by two intersecting lines.
Therefore $\angle$SON = $\angle$TOM and $\angle$TOS = $\angle$MON since they are vertical angles.
