In the given figure, if AB//DC and AD // BC, then which of the following is true ?
△ABC≅△CDA by ASA postulate
If ∠ABC=75∘, then ∠CDA = 75∘
In △ABC and △ CDA,
(i) ∠ BAC = ∠ DCA ....(alternate angles)
(ii) AC = AC .......(common)
(iii) ∠BCA=∠DAC .....(alternate angles )
(iv) △ABC≅△CDA .....(ASA Postulate)
(v) ∠ABC = ∠CDA .......(cpct)
∴ if ∠ ABC = 75∘, then ∠ CDA = 75∘
Hence (B), and (D)