Use pythagorean theorem to find the bottom side of the left triangle. 12^2+b^2=15^2 144+b^2= 225 b^2= 81 b=9 you will then subtract 9 from 25 to get 16 area from the triangle on the right A=(1/2)16*12 A= 96 in^2 then for the triangle on the right A= (1/2)12*9 A= 54 in^2 then add the two areas together
