The sign ⊥ in AE⊥DC shows that AE is perpendicular to DC.
In the figuere, if AE || DC and AB=AC,the value of ∠ABD is
In the given figure, if AE∥DC and AB=AC, the value of ∠ABD is
(a) 70∘
(b) 110∘
(c) 120∘
(d) 130∘