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The value of angle BDE is 86⁰.
option D.
The value of angle BDE is calculated by by applying the following method as shown below;
line OJ = line OB = radius of the circle
∠ OBJ = ∠ OJB = 47⁰
∠ JOB = 180 - ( 47 + 47 ) = 86⁰
∠ OBD = ∠ OED = 90⁰
The angle at the center, ∠ EOB = ( 47 + 47 ) = 94⁰
The required angle BDE is calculated as follows;
∠BDE + ∠OBD + ∠ OED + ∠ EOB = 360 ( sum of angles in a quadrilateral)
∠BDE + 90 + 90 + 94 = 360
∠BDE + 274 = 360
∠BDE = 360 - 274
∠BDE = 86⁰
Learn more about angles in a triangle here: https://brainly.com/question/25215131
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Rewritten by : Brahmana