I don't know the answer but my tip would be to split the shape the way I did it, find the lengths of each side, and then find the area for each individual shape.
Then add all the areas together.
Answer:

Step-by-step explanation:
we know that
The scale is 
That means
1 unit in the drawing represent 40 units in the actual
or
1 inch in the drawing represent 40 inches in the actual
step 1
Find the actual dimensions of the living room
Multiply the dimensions of the living room in the drawing by 40


step 2
Convert inches to feet
Remember that

To convert inches to feet , divide by 12
so


step 3
Find the area in square feet
Multiply the length by the width

Convert to mixed number

Answer:
www.mahtpapa.com
Step-by-step explanation:
All you have to do is just add up all the sides to find the perimeter