as you can see from my diagram, oh wait
use pythagorean theorem to find the height of the paraoellogram
ok, so the hytponuse is 5 and one leg is 4
4²+x²=5²
16+x²=25
x²=9
x=3
so the heights of those triangles are 3
we got 6 of those triangles and 1 rectangle
6 heights are 3 and bases are 4
for the rectangle, height is 3 and base is 4
so total area=(6)(1/2)(3)(4)+(3)(4)=36+12=48 squar inches