Divide the arrow into upper triangle and lower rectangle
area of triangle :-
[tex] \frac{1}{2} \times base \times height[/tex]
[tex] \frac{1}{2} \times 20 \times (15 + 8 + 8) \\ \frac{1}{2} \times 20 \times 31 = 310[/tex]
area of rectangle :-
[tex]length \: \times \: width \\ 15 \times 20 = 300[/tex]
add both the area :-
area of triangle+ area of rectangle = area of arrow
310 + 300 = 610 cm²
