Question 294119
<pre><font size = 4 color = "indigo"><b>
Draw it like below.  Get a protractor and measure the 43° angle,
then measure the sides, and mark them 19 and 16, and mark the 
side you were to find x,  The one below is pretty close to the 
right dimensions according to my computer screen.  So you could 
print it out and trace it. Or you could just put your paper up 
to the screen and trace it. 

{{{drawing(400,247.6190476,-1,20,-1,12,
arc(0,0,9,-9,0,43), locate(16,6,x),
locate(2,1.2,"43°"), locate(9,0,19), locate(4.6,6,16),

triangle(0,0,19,0,11.70165923,10.91197376)  )}}}

{{{x^2=19^2+16^2-2*19*16*cos("43°")}}}
{{{x^2=361+256-608*0.7313537016}}}
{{{x^2=361+256-608*0.7313537016}}}
{{{x^2=172.3369494}}}
{{{x=sqrt(172.3369494)}}}
{{{x=13.12771684}}}

Looks like your answer 13.13 is right on the money!

Edwin</pre>