If m∠ABC is 160°, and m∠ABD is 92°, what is the angle measure of DBC? ∠ABD and ∠DBC are adjacent angles inside ∠ABC.
The sum of the angle measures inside angle ABC is 180°. That means the measure of angle ABC minus the measure of angle ABD will equal the measure of angle DBC.
180° - 92° = 88°
So, angle DBC measures 88°.