HELP! I need 2 problems for this question!
1 answer:
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The law of cosines can be helpful here. The largest angle (C) will be opposite the longest side (c). That law tells us ...
... c² = a² + b² -2ab·cos(C)
Then
... cos(C) = (a² +b² -c²)/(2ab)
We don't actually need the angle. We only need to know the sign of the cosine.
... cos(C) = (7² +15² -17²)/(2·7·15) = -15/210 . . . . negative sign, so C > 90°
The sail has the shape of an obtuse triangle.
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A triangle solver app on your calculator, phone, tablet, or computer can give you the result easily.
Check the picture below.
make sure your calculator is in Degree mode.
but will run you about 36.8698976458° and 53.13010235415598°.
make sure your calculator is in Degree mode.
but will run you about 36.8698976458° and 53.13010235415598°.