You have to find the area of the square so 5x10 then the area of the triangle 5is parallel to the one above so what’s also 5 16 is the total high of the square and triangle combined . So you’d take 10 out of 16 so 6 and 5 beings the sides of the triangle , then you’d add up the two sides and just subtract the area of the no Sade’s and ur left w/ the shaded region