Abby used the law of cosines for KMN to solve for k.
k2 = 312 + 532 – 2(31)(53)cos(37°)
Law of cosines: a2 = b2 + c2 – 2bccos(A)
What additional information did Abby know that is not shown in the diagram?
mK = 37° and n = 31
mK = 37° and k = 31
mN = 37° and n = 31
mN = 37° and k = 31