Law of Cosines (Sec 8-4) Answers
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Which of these triangles can you use the law of cosines to solve for a missing side?
A
[Image: A triangle has angle 75 degrees and 38 degrees. A ...]B
[Image: A triangle has side lengths x, 8, and 12. The angl...]C
[Image: A right triangle is shown. The hypotenuse has leng...]D
[Image: A triangle with 3 angle measures of 60 degrees is ...]2
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A surveyor measures the lengths of the sides of a triangular plot of land. What is the measure of the angle of the triangular plot at which the surveyor stands? Approximate to the nearest degree.
A
cos–1(0.75) = 41°B
cos–1(0.125) = 83°C
cos–1(0.563) = 56°D
cos–1(0.15) = 89°3
ΔDEF is an isosceles triangle with base angles E and F.
Answers:
Blank 1:113569
Blank 2:83
4
What is true when the plane is 100 meters away from takeoff? Check all that apply.
A
The given information is the SSS case.B
The given information is the SAS case.C
The given information is the SSA case.D
Evelyn is approximately 104 meters from the plane.E
The angle of elevation of the plane is 12°.5
A pilot flies 720 miles from Dallas, Texas, to his first destination. After dropping off his cargo, he flies southeast 290 miles to his second destination. If the angle formed by his trip is 125°, what is the distance he will fly from the second destination back to Dallas?
A
490 milesB
918 milesC
1,010 milesD
842,026 miles6
⇒ 7.7
Answer:
113571
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