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viva [34]
3 years ago
12

HELPP..........anyone​

Mathematics
1 answer:
Alborosie3 years ago
4 0

Answer:

  • (12, 12, 156) and (9, 9, 162)

Step-by-step explanation:

<u>Since AB = AC and the triangle is isosceles:</u>

  • ∠ABC ≅ ∠ACB
  • 3x² - 2x + 4 = 9x - 6
  • 3x² - 11x + 10 = 0
  • x = (11 ± √(121 - 4*3*10)/6
  • x = (11 ± 1) / 6
  • x = 2, x = 10/6

<u>The angles:</u>

  • m∠B = m∠C = 9*2 - 6 = 12°
  • m∠A = 180 - 2(12) = 156°

  • m∠B = m∠C = 9(10/6) - 6 = 9°
  • m∠A = 180 - 2(9) = 162°
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