Problem Solving, Parallelograms

Question

Two Adjacent Sides Of A Parallelogram Are 29' And 37", Respectively. The Angle Between These Two Sides Is 65° Find The Length Of C.

Answer 1

I am assuming that the sides have lengths 29" and 37" and that C is the diagonal opposite the 65° angle.

Then, by the Law of Cosines, C² = 29² + 37² - 2(29)(37)cos65°.

Simplifying, we get C ≈ 36.1"