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REET Feb 16 p1, Q97

0. reetfeb16/q97

  • Option : A
  • Explanation : As, ∠ACB = 180° - (∠ABC+ ∠BAC)
    = 180° - (50°+ 30°) = 100° (Sum of angles of a triangle)
    ∴ ∠ACD = 180° - 100° = 80° (Linear Pair)
    ∴ ∠AED = ∠ACD + ∠EDC
    = 80° + 25° = 105° (Exterior Angle Theorem).
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