Angle Relationship Theorems

In the diagram, m∠1 = 2x + 1 and m∠3 = 5x + 11. What is the measure of ∠3?

131 degrees

Line AD is perpendicular to line BF. If m∠2 = 36 degrees, then what is m∠AOC?

144 degrees

Adjacent, right angles are complementary.

Never

If angles are supplementary, then one of the angles is an obtuse angle.

Sometimes

Lines AD and BF are perpendicular. Which two angles are supplementary angles?

∠DOE and ∠AOE