Answer:
610m^2
Step-by-step explanation:
break the polygon into two rectangles as shown in attachment
I have labeled the new length A
A = 50 - 18
A = 32 m
area of rectangle 1 = l x w
= 5 x 32
= 160m^2
area of rectangle 2 = l x w
= 18 x 25
= 450 m^
area of polygon = rectangle 1 + rectangle 2
= 160 + 450
= 610m^2
