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

step-by-step explanation:

given equation

we need to find the value of k.

we also given   law of cosines:

let us solve above equation for k first.

taking square root on both sides, we get

k ≈ 34.

but in the given options, we are given k value 31.

also angle k would be 37°.

so, you could choose correct option

step-by-step explanation:

a rhombus is a parallelogram enjoying his symmetry.

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square