What is the length of JK¯¯¯¯¯, to the nearest tenth of a millimeter? 4.5 mm 5.6 mm 8.3 mm 19.9 mm
https://prntscr.com/j3hfwg
http://prntscr.com/j3hfwg
We can use the Law of Cosines, here
JK = sqrt [ 3^2 + 5^2 - 2(3)(5)cos (62) ]
JK = sqrt [ 34 - 30cos(62) ] ≈ 4.46 mm ≈ 4.5 mm
+220 
