In the figure, given below, AD = BC, ∠BAC=30∘ and ∠CBD=70∘.
Find :
(i) ∠BCD
(ii) ∠BCA
(iii) ∠ABC
(iv) ∠ADB
From ( angles in the same segment)
From (angles in the same segment)
In
Since
In
is a cyclic quadrilateral.
Hence
(i)
(ii)
(iii)
(iv)