Answer:
20yd^2
Explanation:
if you cut the shape in the x axis you have a triangle and rhombus
if you find the area of each and add 
Area of rhombus is diaginal times diaganol over 2 
(4x5/2) = 20/2 = 10yds 
area od a triangle is base times hight times 1/2 
(5x4x1/2) 20x1/2 = 10yd
10 + 10 = 20 yards