the complete question in the attached figure
we know that
When we know two sides and the included angle the formula for calculate the area is
Area=(1/2)*a*b*sin C
in this problem
let
a=20
b=12
C=68°
Area=(1/2)*20*12*sin 68°------> Area=111.26 units²-----> Area=111.3 units²
the answer is
111.3 units²
