Use the constructions of congruent segments, congruent angles, angle bisectors, and perpendicular bisectors to make conjectures about geometric relationships
Vertical angles have a very special quality. They are always congruent to one another! Check out this tutorial to learn about and see how to identify vertical angles!
Further Exploration
Apply theorems about circles, including relationships among angles, radii, chords, tangents, and secants, to solve non-contextual problems