Q. 45.0( 2 Votes )

A diagonal

Answer :


Given: ∠BDC = 25°


To Find: ∠ACD


∠ACD = ∠BCD


[ Diagonals of a rectangle are equal and thus will subtend equal angles at vertices]


∠ACD = 25°


In Δ COD,


Sum of angles of a triangle = 180°


ACD + BCD + COD = 180°


25° + 25° + COD = 180°


COD = 180° – 50°


COD = 130°


COD + AOD = 180°


[ Sum of angles on straight line = 180°]


130° + AOC = 180°


AOC = 50°


Hence, (B) is the correct option.


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