Question 104134
The diagonal of the rectangle is the hypotenuse of a 30-60-90 degree triangle.
h=10
sin(30)=opp/10
opp=sin(30)*10=5
.
cos(30)=adj/10
adj=cos(30)*10=8.66...
.
A=5*8.66...=43.3013 sq units
.
Ed