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warpedkitten
 one year ago
Zack, Rachel, and Maddie are unraveling a huge ball of yarn to see how long it is. As they move away from each other, they form a triangle. The distance from Zack to Rachel is 3 meters. The distance from Rachel to Maddie is 2.5 meters. The distance from Maddie to Zack is 4 meters. Find the measures of the three angles in the triangle.
warpedkitten
 one year ago
Zack, Rachel, and Maddie are unraveling a huge ball of yarn to see how long it is. As they move away from each other, they form a triangle. The distance from Zack to Rachel is 3 meters. The distance from Rachel to Maddie is 2.5 meters. The distance from Maddie to Zack is 4 meters. Find the measures of the three angles in the triangle.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0looks like a law of cosines problem to me

warpedkitten
 one year ago
Best ResponseYou've already chosen the best response.0It is, but I'm not understanding it. I've done similar problems and it seems like every time I try, I don't get any of the answer choices.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0lets agree on this labelling, i will let you fill in the names etc

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1433387769343:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0B is opposite the largest side, so it is the largest angle, we can find that first

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[b^2=a^2+c^22ac\cos(B)\] but we want the angle so \[\cos(B)=\frac{a^2+c^2b^2}{2ac}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0filling in the numbers we get \[\cos(B)=\frac{3^2+2.5^24^2}{2\times 3\times 2.5}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0take the arccosine to find B

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0satellite can you help me?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i must have made some mistake here

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh, no i didn't here use the calculator http://www.wolframalpha.com/input/?i=arccos%28%283^2%2B2.5^24^2%29%2F%282*3*2.5%29%29

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0looks like the largest angle is \(92.87^\circ\) find the next one of your choice using the law of sines

warpedkitten
 one year ago
Best ResponseYou've already chosen the best response.0I've got it now, thank you!
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