For the right triangle below, find the length of x.

12<-- 43 °x[Graphs generated by this script: initPicture(-3,13+15,-3,13+3);path([[0,0],[12,0],[0,13],[0,0]]);path([[0,.7],[1,.7],[1,0]]);text([12/2,0],"12","below");text([0,13+.5],"<-- 43 °","right");text([0,13/2],"x","left")]

x =