ln a quadrilateral ABCD, E is a point in the interior of the quadrilateral such that DE and CE are the bisectors of ∠D and ∠C, respectively. If ∠B = 82° and ∠DEC = 80°, then ∠A = ?
A. 75°
B. 81°
C. 84°
D. 78°
Answer: Option D
Solution (By Examveda Team)
α + β = 100°
2(α + β) = 200°
360° = 282° + ∠A
∠A = 78°
This Question Belongs to Arithmetic Ability >> Geometry
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