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.

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jumbojimbo1243 jumbojimbo1243

11-12-2020

Answer:

107.2

Step-by-step explanation:

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

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