yukan yuze triangel sine law
(side length) / (angel over theer)=konstant
yu sho 1 angel =56deg kros from side leng=10
so konst=10/ sine(56)= 10/0.829037572=12.06217948
differ angel=43 deg, so side kros from it (perhaps b)
then b/sine(B)=a/sine(A)=konst
so b=konst*sine(B)=konst*sine(43)=12.06217948*0.68199836
=8.226412854
angel C=180-(56+43)=180-99=81 det
side c=sine(81 deg)*konst=0.98768834*12.06217948
=11.91367403