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10 POINTS PLEASE HELP
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37 votes
37 votes
10 POINTS PLEASE HELP

10 POINTS PLEASE HELP-example-1
User Adam Crume
by
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1 Answer

15 votes
15 votes

Answer:

m∠A = 49°

Explanation:

According to Angle Sum Property,

  • angles of the Δ add up to 180°
  • ∠A + ∠B + ∠D = 180°
  • 5x - 6 + 7x - 24 + 78 = 180
  • 12x + 48 = 180
  • x + 4 = 15
  • x = 11

m∠A

  • 5x - 6
  • 5(11) - 6
  • 55 - 6
  • 49°
User Baklazan
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2.7k points
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