If ∠ABC = 80∘, ∠ABC is also known as a/an ___ angle.
∠ABC is also known as a acute angle as it is less than 90∘.
In aΔABC,side BC is produced to D.If∠ABC=50∘and ∠ACD=110∘then ∠A=?(a)160∘ (b)60∘ (c)80∘ (d)30∘