Question

please help pic in comments:)))

Answer 1

Have you heard of the law of cosines? That is what I would use to solve this problem

Answer 2

yes but thats confusing

Answer 3

okay the law of cosines states \(b^2=a^2+c^2-2ac~cos(B)\). Since in this formula a and c are the 2 given sides, B is the given angle and b is the unknown side. We can see from the triangle that a=15 because it is the side across from angle A, and c=12 because it is the side across from angle C. We also know that B=106 so we plug them into the formula
\(b^2=(15)^2+(12)^2-2(15)(12)~cos(106)\)

Answer 4

121.86?

Answer 5

wait 468

Answer 6

Yes the second one is correct, and if \(b^2=468\), what does b=?

Answer 7

would i just square 468..

Answer 8

Not quite, you want to do that opposite and the opposite of a square is the square root

Answer 9

21.63

Answer 10

I would say 21.64, you rounded a little bit when solving for \(b^2\), when I did it without rounding I got 21.64 but you get the idea, good job! :)