vertical angles are always \( \begin{array}{ll}\text { a) adjacent angles } & \text { () acute } \\ \text { c) total } 180 \text { degrees } & \text { d) congruent (equal measures) }\end{array} \)

Vertical angles are always congruent (equal measures). This means that when two lines intersect, the angles that are opposite each other (the vertical angles) will have the same degree measure. So if one angle measures 70 degrees, the vertical angle will also measure 70 degrees! In a fun twist, you can think of vertical angles as the "twin angles" of the geometry world! They may look different at first glance, especially when they are in different positions, but just like identical twins, they share the same characteristics. Whether they're on a math quiz or during real-life situations involving intersections, these angles stick together with their equality!