18. The angles congruent to ∠EAD are marked with a double arc. In addition to ∠EAD, they are ...
... ∠ADB, ∠DBC
19. ∠BDC is marked with a single arc, so has the same measure as ∠AED. The measure of that angle is given as 34°.
20. ∠ADB is marked with a double arc, so has the same measure as ∠EAD. The measure of that angle is given as 112°.
