∴∠AOC = 1/2 ∠COE = 35 (angle bisector definition)
∴∠BOD =∞∠AOC = 35° (equal to the vertex angle).
(2) 𕚸 EOC+∠EOD =180 (adjacent complementary angle definition)
∠EOC :∠EOD = 2: 3 (known),
∴∠COE= 180 ÷(2+3)×2=72,
∴∠AOC= 1/2∠EOC=36,
∴∠BOD=∠AOC=36 .