Question 241302
using sine rule to get angle b we have
20/sinx= 35/sin43
20sin43/35 = sinx 
X= [20sin43/35]sine inverse
Subtract the sum of 43 degrees and x calculated above from 180 degrees to get angle C
To get the value of the third side c, apply sine rule again and get
20/angleB= c/angleC to get the third side