Question 306617: Sorry for the lact of picture...I don't know how to post it. I do know that it is an oblique triangle where a is the bottom (width) and b and c are on the left and right side, respectively. a = 5, b = 6, and angle between a and b = 1/3pi. Find c. Thank you in advance.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Sorry for the lact of picture...I don't know how to post it. I do know that it is an oblique triangle where a is the bottom (width) and b and c are on the left and right side, respectively. a = 5, b = 6, and angle between a and b = 1/3pi. Find c.
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Use the Law of Cosines:
c^2 = a^2 + b^2 - 2ab*cos(pi/3)
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c^2 = 25 + 36 - 2*5*6*(1/2)
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c^2 = 61 - 30
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c = sqrt(31)
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Cheers,
Stan H.
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