Answer:
40.5
Step-by-step explanation:
To find the area of a parallelogram you use the equation a=bh. You already know that the height is 4.5cm, which plugged in to the equation makes the equation a=b*4.5. The base is twice the height, and knowing that the height is 4.5cm, you just multiply that by two in order to get 9cm for the base. Plugged in to the equation now it is a=9*4.5. We now know the area = 40.5
