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Marina86 [1]
3 years ago
12

Not sure how to answer question 4

Mathematics
2 answers:
laiz [17]3 years ago
8 0
D = 86
Because its the nearest degree to 90 as you see < BAC seems to be 90
drek231 [11]3 years ago
5 0

Answer:

<em>Option D is correct</em>

Step-by-step explanation:

Applying the cosine theorem for triangle ABC, you would have:

cos (angle BAC) = (BA^2 + CA^2 - BC^2)/(2*BA*CA)

                           = (10^2 + 18^2 - 20^2)/(2*10*18)

                           = 24/360

=> angle BAC = ~86 deg

Hope this helps!

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