If m∠BOA is 180° and m∠BOC is 110°, what is the measure of ∠COA
If m∠BOA is 180° and m∠BOC is 110°, then we can subtract the measure of m∠BOC from m∠BOA to find the measure of ∠COA.
∠COA = ∠BOA - ∠BOC
∠COA = 180° - 110°
∠COA = 70°
Therefore, the measure of ∠COA is 70°.