Choose the correct answer from the alternatives given : In the figure given below what is the measure of ∠BYX?
A
85∘
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B
50∘
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C
45∘
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D
90∘
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Solution
The correct option is C85∘ We know that angles in the same segment of a circle are equal. :. ∠XBY = ∠XAY = 45∘ In ΔBXY, ∠BXY + ∠XBY - ∠BYX = 180∘ ⇒50∘+45∘+∠BYX=180∘ (:. ∠BXY=50∘) ⇒∠BYX=180∘−95∘=85∘