we gots triangle and half circle
square is meaning all sides are 20
that means height and base are 20 (isocelese)
and diameter is 20
area triangle=1/2bh=1/2(20)(20)=200
square=side*side=20*20=400
semicircle=1/2*pir^2
d/2=r, 20/2=r=10
semi=1/2*pi*10^2=1/2*pi*100=50*pi
using aprox pi=3.141592
semi=157
add them all
200+400+157=757
G is answer