The adjacent complementary angles of ∠BOE are ∠BOF and ∠AOE.
(2) DOA is ∠COB.
∠EOC has an antipodal angle of∠ ∠FOD.
(3) ∠ BOD = ∠ AOC = 50 (vertex angles are equal)
∠ Cob = 180 —∠ AOC =130 (the sum of adjacent complementary angles is180).