zaneb131 zaneb131
  • 03-06-2018
  • Mathematics
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Find the angles please please

Find the angles please please class=

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adrielcavalcant
adrielcavalcant adrielcavalcant
  • 03-06-2018
Angle BAC
cosφ⁻¹ = (10² + 17² - 11²)/(2*10*17) = 37.9 ≈ 38°
Angle ACB
cosφ⁻¹ = (10² + 11² - 17²)/(2*10*11) = 108.0°
Angle ABC
cosφ⁻¹ = (11² + 17² - 10²)/(2*11*17) = 34.0°
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