Answer:
Answer is in the attachment..............
Step-by-step explanation:
1x•4x•5x=180
10x=180
10/10x=180/10
X= 18
They are multiplying by two .
area of rectangle= 8*13=104m^2
base of the Triangle= 13 -(4+4)=5
area of Triangle = 5*6/2=15m^2
area of shaded shape =104-15= 89m^2