jerraylabrewer20 jerraylabrewer20
  • 10-12-2020
  • Mathematics
contestada

In ΔKLM, k = 89 cm, l = 20 cm and m=81 cm. Find the measure of ∠K to the nearest 10th of a degree.

Respuesta :

jumbojimbo1243 jumbojimbo1243
  • 11-12-2020

Answer:

107.2

Step-by-step explanation:

  1. cosK= (81^2)+(20^2)-(89^2) / 2(81)(20)
  2. cosK= -960 / 3,240
  3. cosK= -02963
  4. K= cos^-1(0.9230)
  5. K=107.2
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